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Install 203

tenderfoot said:
When I bought my '78 it was like that. I figured maybe for an improvement on drive line angle? I don't know made me nervous the dizzy that close to the firewall.
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Yes the lift kits tell you to do that.
I tried it, many different sizes. Recently I installed Diy4x competition motor mounts, took out my t case shims, truck is smoothest it's been in years. Have just a touch of driveshaft vibration, I blame the diff pinion angle for that. Again aftermarket lift blocks trying correct/cover lift issues cheaply.
When I do my shackle flip I will correct the pinion angle for my 2 piece drive shaft.
If I had a 1 piece CV style shaft I think the pinion angle would work.
 
Wes Harden said:
The red spacers between cross member and frame need to be above the frame. bolt cross member tight up to frame.
If you haven't done so already.

View attachment 330643
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This is how it was when i bought it. I was told to make driveline angles not so drastic, so i put it back this way....

37” tires and 4” ift is what I have, though the lift sure feels higher.

Also if the cross member is supposed to be flush with the frame rails, why even use the spacers?
 
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You have 4" lift? The angles depend on style of drive line. No one size fits all. If you have CV style bolt cross member flat and adust pinion angle up. If u joint style you need to make the pinion angle match the t case angle within 1 or 2 degrees.
 
frankin5 said:
springs or blocks rear?
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Leafy Springs and the flip lift shackle do-hicky thingy.

Yes, new rear leaf springs are next once Im dont with everything else.

From where the guys at ORD told me to measure upfront I have a 4inch lift

BECC2042-4603-443B-AAEB-67C0FA68E2F4.jpeg
 
You need to get a magnetic angle finder. They are not that expensive. Measure the angle of TC output shaft, top of drive shaft, bottom of drive shaft and the pinion angle. When all said and done the angle at top and bottom should not be more than a degree out. If it is then you you have to shim the springs, change length of shackles or rotate the axle. To go double cardon the pinion has to point directly at the output shaft of the TC.
 
honestly, I have enough on my plate for now. I will look into this once I get other stuff done. It ran fine in this configuration but that doesn’t mean there may not be improvements to be made.

I will take a look once the drive lines are installed and start a fresh thread if need be.
 
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