Author Topic: engine swap from 305 to crate 350  (Read 3965 times)

Offline chevy868686

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engine swap from 305 to crate 350
« on: April 26, 2012, 01:48:32 PM »
Hey guys need a lil help here on my 86 c10... Im trying to keep all emissions stock but got lost on vacuum lines on how it goes i have a stock quadrajet 4bbl rochester and and since i had a 305 and replaced it with a crate 350 does anything change on how vacuum lines go orhow do i search for the diagram..any help will apreciate :Dd thanks

Offline bake74

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Re: engine swap from 305 to crate 350
« Reply #1 on: April 27, 2012, 05:40:40 AM »
     I assume that you no longer has the ECS sticker on the radiator cowl ?  I have tried a search before on the internet without much luck, I finally had to get someone who had books at what used to be a Chevy dealership, and now is a service center to copy what my truck ECS came stock with.
     As far as all the lines, they should hook up the same if you are using the same carb and componets.
#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 chevy868686

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Re: engine swap from 305 to crate 350
« Reply #2 on: April 27, 2012, 02:48:32 PM »
For some reason i lost the original fan shrouds where it had the sticker ..i did my research last night which i figure it was not easy finding it but i found one in autozone.com and i just hope its the right one because there was a lot to choose from which made it a lil confusing for me

Offline bake74

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Re: engine swap from 305 to crate 350
« Reply #3 on: April 27, 2012, 08:09:41 PM »
     It looks like it could be right for a 86.  Where are you located and do they require everything that originally came on the truck ?  I know that in CA. everything 76 and newer needs what ever came with vehicle.
     Like I said before, the only way to know 100%, is for someone who has access to records for that year to look it up.  Given enough time and someone on here will see it that can do that I am sure.
#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 chevy868686

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Re: engine swap from 305 to crate 350
« Reply #4 on: April 29, 2012, 12:33:28 AM »
I live in south cali ...i want my engine compartment to look clean and like new but i also want everything working correct the way it should with smog test straight so im gonna try to find out at the dealership with the vin number to see if they can send me the original label

Offline Stewart G Griffin

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Re: engine swap from 305 to crate 350
« Reply #5 on: April 29, 2012, 11:28:52 AM »
If you're re-using the quadrajet manifold, then everything should stay the same;  Give me a few---i should have a diagram file around here somewhere for an 83.    Also, the goodwrench 350 has a provision for the ESC sensor on the side of the block.

i will also check the 83 service manual.


But for now, this may not help much but may give you some inspiration:


Oh, P.S.  i just re-read that you have an 86, plus you're in california which may make things very different;  Do you have an A.I.R. pump?
« Last Edit: April 29, 2012, 11:30:40 AM by Stewart G Griffin »

Offline bake74

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Re: engine swap from 305 to crate 350
« Reply #6 on: April 29, 2012, 12:13:21 PM »
I live in south cali ...i want my engine compartment to look clean and like new but i also want everything working correct the way it should with smog test straight so im gonna try to find out at the dealership with the vin number to see if they can send me the original label

     I feel your pain, I live in Sac, CA. that is why I build 73 - 75 trucks now, I hate dealing with smog issues in this state.
#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 chevy868686

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Re: engine swap from 305 to crate 350
« Reply #7 on: April 30, 2012, 04:47:57 AM »
Yes i have an air pump and i took the stock manifold of and replaced it with an edelbrock #3107  w/ egr ...i started this project a while ago wich i stopted working on when i had my first baby but now got back to it and now i realise i should of got a 73 . Ive done too much to it that i domt wanna start all over again and wanna go though it until i figure it out..but anyway whats with the provision for the esc sensor about?..thanks guys