Drum to Disc, Changed Track Width

[1970 CST Short Wide]

Originally Posted by 67ChevyRedneck

It might have been more than that, if you're going by your 15" and 16" measurements to the rotors face... Wheels don't mount to the rotor face, it looks like the mounting flange is further back too. It looks more like you went from 16-7/8" to 15-5/8, maybe 3/4, hard to tell with angle. So maybe 1-1/8 to 1/1/4 per side? That's a big gain! I had to buy a set of 7" wheels for the front of my truck because my old 8" wheels rubbed bad with the drop.

I agree with the "off the shelf fits all" comment. I have a 68 firebird and bought a set of the 17" pontiac rally II wheels. Look killer. However, they really need to be sucked in 1/2" in the rear (fixable with rolling/cutting the fender lip) but the front really needs to go in 3/4-1" per side if you want to drop the nose of the car any at all. They're "work" with stock height springs, but barely and you have to run a small tire. These are claimed to "fit" all 1st and 2nd gens. They definitely fit the 69s and 2nd gens better (they're a couple inches wider). It's a shame because they look so great, but really, the offset is all wrong to fit 67/68s.

As I said ~ 1”. I knew the measurements weren’t very accurate, I measured from a convenient spot I could go back to. The whole idea was to see if it really worked as I kept getting conflicting answers.