Author Topic: Will 1 ton cab work on 1/2 ton?  (Read 14490 times)

Offline Kris_77stepside

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Will 1 ton cab work on 1/2 ton?
« on: February 08, 2012, 11:03:28 pm »
I found someone that has a 1978 1 ton cab that looks to be in good shape.  I was wondering if it will work on my half ton and if so do I use the half ton body bushings/ mount kit or will I need to order a kit for a 1 ton cab? 

Offline Blazin

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #1 on: February 09, 2012, 06:20:39 am »
You don't mention what year your truck is, or what transmission the donor cab or your truck are?
All the cabs are the same with the exception of the center hump.
All 4x4s have tall center humps.
2 wheel drive SM465 transmission cabs have a tall center hump that doesn't go back under the seat as far.
2 wheel drive 3 spds. and automatics have a low hump. If the new cab is not the same as yours its as simple as cutting out your center hump, and mounting it in the new cab. I like to use a sealant butyl tape, and large head self drilling sheet metal screws. Others weld them in.
Using a body lift will make it clear as well. but I don't recommend body lifts.

As far as the body bushings you need to use the ones for your year frame. 73 to 80, or 81, 87/91.

« Last Edit: February 09, 2012, 06:23:19 am by Blazin »
Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs

Offline bake74

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #2 on: February 09, 2012, 07:00:58 am »
You don't mention what year your truck is, or what transmission the donor cab or your truck are?
All the cabs are the same with the exception of the center hump.
All 4x4s have tall center humps.
2 wheel drive SM465 transmission cabs have a tall center hump that doesn't go back under the seat as far.
2 wheel drive 3 spds. and automatics have a low hump. If the new cab is not the same as yours its as simple as cutting out your center hump, and mounting it in the new cab. I like to use a sealant butyl tape, and large head self drilling sheet metal screws. Others weld them in.
Using a body lift will make it clear as well. but I don't recommend body lifts.

As far as the body bushings you need to use the ones for your year frame. 73 to 80, or 81, 87/91.

     What he said times 2.  ;D
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom

Offline Kris_77stepside

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #3 on: February 09, 2012, 11:16:43 am »
Well if you look at my name you can see that mine is a 77 and for transmission I have a th350.  The 78 cab is a 4x4 truck and it has a th400 trans.  So looks like it should work, just have a tall center hump cause there is no way I can cut mine out and swap it cause mine is completely gone.  Thanks.
« Last Edit: February 09, 2012, 11:18:17 am by Kris_77stepside »

Online VileZambonie

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #4 on: February 09, 2012, 11:24:38 am »
Well if you look at my name you can see that mine is a 77 and for transmission I have a th350.  The 78 cab is a 4x4 truck and it has a th400 trans.  So looks like it should work, just have a tall center hump cause there is no way I can cut mine out and swap it cause mine is completely gone.  Thanks.

So you ask a question and expect people to guess on your specific vehicle information? The more info you give the more accurate the responses will be. http://forum.73-87chevytrucks.com/smforum/index.php/topic,5220.0.html
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline Kris_77stepside

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #5 on: February 09, 2012, 02:41:50 pm »
I wasn't expecting anyone to guess on my specific vehicle information,  I was just wondering if a one ton cab is the same size and mounts the same as a half ton cab.  Doesn't matter now anyways as the guy sent me some more pics and the cab is junk. 

Offline Blazin

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #6 on: February 09, 2012, 11:05:27 pm »
Well if one was to look at my screen name, there is a good chance they think I smoke allot of dope!
Theres an even better chance they would be wrong!

 This is a family oriented site. There is a wealth of information here that we all as new or veteran members enjoy sharing with each other. You asked a question, I took time out of my morning to answer it to the best of my knowledge given the fact I didn't know all the details of your situation.  This is the response I see when I log in after a long day at work?
" Well if you look at my name you can see that mine is a 77 "
If you come here with an attitude it will get squashed in short order!

 Just because you have 77 in your screen name doesn't mean that's what year truck you have. That could be the year of your first ever truck, or your dream truck, or the year of your father's, or grand father's truck when you were a kid.
It could be your birth year, or your IQ for all I know!

 You will also notice if you look at my name I am one of quite a few moderators here. If you don't like what I have to say, feel free to take it up with one of the other mods, or the owner of the site. Harold ( Blazin ).

Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs

Offline Kris_77stepside

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #7 on: February 09, 2012, 11:46:44 pm »
I wasn't coming on here with an attitude or trying to sound like a jerk, I was just saying that the year in my screen name is the year of my truck.  I wasn't expecting anyone to know that or know everything about my truck.  I appreciate all the info I get from this site and that "Thanks" I put in my earlier post was for all the info you gave me.  This is the first one of these trucks I have ever owned and don't know a lot about them.  Didn't know there was a difference in the cab center hump and thought they were all the same.  Also, I didn't know much about the cab for sale other than it was off a one ton. I had to ask the guy about what kind of truck it was after I saw your post, hence why I never posted all the info right away. 

Offline Blazin

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #8 on: February 10, 2012, 12:05:23 am »
It wasn't what you were saying, it was how it could be taken the way it was written. You have to remember we don't know you personally. Amongst your friends that response may be fine. To someone you don't know, it came off a little snot bagish!
 
I figured you might not know the particulars of the cab, as allot of the time its a from an add of some sort, sight unseen persay. I think what Vile was getting at, and my thought is the more we know, the simpler, and better the answer is going to be. Therefore you get better info from it when you read it.

 Depending on the area of the country your from cabs should be plentiful to find used. I know in the North east where I live they are hard to find. Medium duty cabs are different. The floors are flat, and the fire wall is a little different behind the engine, the position of the steering column, pedals, and brake cylinder assembly is also different.
Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs

Offline Kris_77stepside

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #9 on: February 10, 2012, 12:22:39 am »
Sorry about that, from now on I'll make sure to word it right so I don't come off as a jerk.  Also I'll post as much info as I can and know about something to help everyone else out.  As for finding cabs, I live in Minnesota and have found a couple but they're usually rotted out to the point where aftermarket patch panels won't fix them.

Offline bake74

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #10 on: February 10, 2012, 12:46:57 am »
     Now that is over, Can't we all just get along  ;D.
     Kris_77, do you have any pics of your cab for us to see ?  Is it so far gone that you don't want to repair it, or do not have the means ? 
     It probably is difficult to find a cab in Minnesota.  Have you tried surrounding area's for some.  Just throwing out some idea's.
#1: The easiest and most obvious solution to any problem is 99% of the time correct.
#2: There is no such thing as impossible, it just takes longer.
  74 k10, 77k10    Tom

Offline Kris_77stepside

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #11 on: February 10, 2012, 09:41:10 am »
Well it needs rockers, cab corners, inner cab corners, below the rear window by the bottom is rusted through into the cab pretty bad, it needs all floor supports and cab supports/mounts, the floor is rusted way more than what floor pan patches would cover,  kick panels and if it's anything like the step side box I replaced, It's probably coated in a ton of bondo.  Oh, and doors lol. Could probably be fixed if you were really, really ambitious but I think it would be way easier and cheaper to find one that just needs a couple patches at most.  The truck is pretty solid for the rest of it.  Like I said I replaced the step side box with an almost rust free fleet side short box and the front fenders were replaced before I got the truck and are rust free.  So basically the cab is the worst part.  I'm gonna contact the guy I got the box from as he had the cab for sale too which just needed rockers and cab corners which he already has for it.  He sold me the box with a slightly damaged new box side for $150 so maybe I can get the cab fairly cheap.  All I know about the cab is it was a 6.2 diesel truck, 2wd but don't know what transmission it had. 

Offline Blazin

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #12 on: February 10, 2012, 09:00:25 pm »
Auto 6.2s are more common, than sticks. You might have to find another donor cab for the center hump. If its a 62 it is probably 81/82 or newer cab.

You will need to make fillers for the hood hinge holes, and swap out the wiper arm stubs, and transmission assemblies from your cab into it if it is an 81 or newer cab.

The wiper stubs have one hole on each that line up with the newer cab, The other two are only off by a little bit. A file will work to enlarge the holes to get the bolts in.
Some people are like Slinkies. Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs

Offline choptop

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #13 on: February 10, 2012, 10:23:46 pm »
You ought to save up some gas money and take a vacation trip down here to West Texas. For about $1000 or less I could probably hook you up with more parts than you can stack on a 20 foot trailer. The oil field is booming and everyone wants a new truck. 73-87 longbeds are going for around $500 or lessI and many of them are drivers. I saw a nice 85 4 wheel drive  3/4 ton that just needed paint for $1100.
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Offline Kris_77stepside

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Re: Will 1 ton cab work on 1/2 ton?
« Reply #14 on: February 10, 2012, 10:38:30 pm »
Sorry forgot to post the year of the cab.  It's an 85 cab and it was an auto truck.  He said it is in pretty good shape and the floors are solid.  Only thing it needs are rockers and cab corners which he has new ones to go with it.  Said he would sell it for $150 so I'll probably pick it up this weekend if I can use my friends trailer.  Thanks for the offer choptop but money is kind of tight right now and don't have the time to take a vacation.  I know what your talking about though with the oil boom.  It's happening up here in North Dakota and everyone I know who works out there bought a new truck within a couple of months of starting their job.  Blazin, I have some questions.  Do I have to change out the center hump and if so why?  Also what do you mean by transmission assemblies?  Do you mean like the shift linkage?  Thanks for the help.  I've read a little bit about newer cab swaps but I'm sure I haven't seen all the info on it.