72 K30 Build

[7dee2]

Originally Posted by swamp rat

I believe Dieselwrencher is correct on the frame widths. That said there are 2 different rear spring width dimentions on the 67-72 trucks. I know my K20 rear is wider than a 2wd rear with springs. My frame widens behind the cab. If i recall corectly mine is 42.5, the other is 40 i think. So obviously different spring pirch widths on the axles too. If that helps ya any...

Swamprat I did a quick frame width measurement at the back of both cabs and they are both 34". Both trucks are cab & chassis style trucks so maybe that's why they are same width even though they are different generations? Going to look at it much harder once I get the rest of the K3500 cab removed.