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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: VileZambonie on December 04, 2010, 01:18:31 pm
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Well Some things didn't go as planned with some parts I ordered for my four link so I decided I'll use this time to make my C-notch. With everything apart I was hopin someone with a 73-80 frame could take a quick measurement for me. Anyone got time?
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I may can do it tomorrow, what do you need?
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Likewise...What are you looking for?
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Where is the center of the axle in relation to this hole in the frame. This is the LH side of the frame.
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Hey Vile, I went out and measured mine. I come up with 1" 5/16 I shot it with a lazer level off the center of the Axle. But granted my leaf springs are not hooked to the hangers, but the drive shaft is still intact.
Hope this helps.
Rob..
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Rob, You mean you measured the center of the axle tube is 1 5/16" to the left of the hole?
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The center of the Axle tube is 1 5/16" to the Right of the hole.
Rob.
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I measured the Drivers side frame rail. It seems like that hole would be dead center of the Axle on a stock suspesion. The bump / load stop is directly below it. My Truck also has a six inch lift.
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Thanks rob. Can anyone else drop a plumb bob or the like off the frame to the center of the axle before I start cutting?
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Bueller?
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oops, thought you had what you needed. Give me about 30 minutes. I am finishing putting up the tree...
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I measured the same as KYROB on my 75 K5
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I will verify it tonight.
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Vile, I would be concerned with getting this measurement from something like a lifted 4x4. The axle centerline could be different depending on the rear suspension/mods. like going from below the spring to above, a lifted 4x4 would technically be back farther (if using a block) than a stock one. This could also be not "correct" if an angled block was used & which way it was installed on the truck being measured.
Also the measurement changes (moves ahead) as the weight comes off of the springs.
I realize the total amount it moves isn't huge, however if your starting fresh, it would be nice to be centered in the wheelwell.
I'm sure the setup your installing has some adjustment however once you start putting shocks, panhard bar, ect. the forward to backward amount really gets reduced without something being on a bind.
Here's a pic of mine, however it would be back slightly when it's on the ground.
(http://i163.photobucket.com/albums/t285/HAULINIT/truckrearsuspension019-1.jpg)
Here's a link to the Alston site:
http://www.cachassisworks.com/Stories/HowCAC-009_WEB.pdf
The up & down oval hole they are using (showing 15" measuring to somepart on that level at the front of the housing?) measures 17 1/2" on my truck to the CENTERLINE of the housing, might be able to use this for double checking. Hope this helps, Lorne
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Thanks, I decided to wait until I get the axle attached to links. Once I do that I'll jack the axle up high enough to mark it.
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OK bringing this one back from the dead. Anyone with a 2wd 73-80 with a leaf spring suspension, please help me out here. With the vehicle on the ground give me a measurement on the drivers side of the frame to the center of the axle. I want to make sure my measurements are accurate. Use the above pictured hole as your point of reference. I'll explain after why I'm questioning a few things. Thanks
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I have a bone stock 79 c20. From where to where do you need measured.
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Straight up from the center of the axle and a reference on the frame to the elongated hole.
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Okay, its dark out right now, but I will get that as soon as I can.
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I can probably get this for you tomorrow, it is raining here right now. Shoot me an email tomorrow evening and I will check.
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Okay, the center of my axle tube is about 1 and 1/8th" forward, toward the engine, from the left edge of the elongated hole. I cant get an exact without taking my tire off.
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Wow, yours is going the opposite direction of the last two I measured. Anyone else care to throw a measurement ?
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I thought it was odd yoo. And I tripple checked my findings to make sure I wasnt tripping. But thats with bone stock suspension. Does it matter that mine is 3/4 ton? Ill check my buddies truck tonight too. His is also a 3/4 ton.
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It's got to be a short bed....
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Ohhhh. That would be the cause. We both have ling beds. Sorry vile.
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I figured it all out tonight. I'll post the results of my findings when I document the conversion.