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Re: 70 k/20 14 bolt swap questions and concerns
When I put in my 14 bolt in my 72 K20 I used the same drive shaft. My suggestion when you weld on the perchs have the axle on the truck, set the pinion angle, tac weld, then remove and weld up. I didn't have a big enough welder in my shop, so I went to our main shop and welded them on. I went off the angle of the original perchs, not a good idea. I think my angle ended up being off because the springs are different lengths on earlier models. Don't quote me on that but that is all I could come up with. Luckily I was able to shim it 6 degrees to get the proper angle. I could have avoided a $50 bill.
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