Quote:
Originally Posted by 54blackhornet
Can anyone ID this rear, and can I put it under a 71 K -10 ? Guy said it is out of a 86 1/2 ton, also comes with front D44 thanks, is it a 10 bolt ? Should I wait for a 12 bolt ? Truck will not be off road !
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Quote:
Originally Posted by Ol Blue K20
I'm sure you can move the upper mount. I thought they changed the perch width after the square body.... 
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Leaf spring spacing ( distance between perch pads )
67-87 two wheel drive half ton leaf spring are all 42.25
67-72 k-10, 20, and 30 are 40.25
73-87 k-10 are 42.25
73-87 k-20, 30 are 40.25 as are the two wheel drive 30's. The only one I'm not sure ( memory issues ) are the 67-87 two wheel drive 20's (3/4 ton)