[CC69Rat]

Critter -- a 20x9.5 on the rear of a stepside might be a little tight (?) do you know which rear end housing you have? the early / late rear ends will differ slightly.

67-68 and most of 69 the rear end housings were 55.5" long if you measure from the back side of one backing plate to the other. It's just an easier point of reference than taking the wheels off to measure.

late 69-some of 70 and then 71-72 rear end housings are 57" long if you measure from this same point. Plate to plate... you're 1.5" different so you might want to measure to be sure if you haven't already. Being a 72, my guess is the late housing.

Usually what happens if the 9.5" wheel with "0" offset compared to the "15" offset wheel would just be a thicker mounting plate. 5mm= about .25" so it will be about .75" difference in offset (if that helps you)

I have the early rear end housing in my stepside. I am running a 20x8.5" wheel with 4.75" backspacing. 255/45/20 tires. It clears, but just barely. I could air it complately down and not rub the fender lip.

I have seen 22x9 with 5" Backspacing and 265/40/22 under a stepper and it is awesome. This truck has the early rear end in it too.

http://67-72chevytrucks.com/vboard/s...d.php?t=414742


What I'm saying is I think the 9.5" wheel might be a little wide for you. There's not a lot of room on a stepside and kinda be careful with the rear end housing if you don't know which one you have. Also, if the truck is lowered you want to make sure you replace your track bar or one side could be a bit tighter than the other. Ex. The rear end could be shifted to one side slightly.