After several postings and a few weeks of hard labor, I got my 15x7 Rally IIs done. When I put them on my '67 400 convertible the front wheels were hitting the calipers. The wheels mounted on the rotors fine, but they would not turn. My car came with factory disc brakes, but I'm not sure about the 4 piston calipers. Since breaking is kind of important I want to stay with my current calipers and I really want to have the Rally IIs on also. Has anyone else dealt with this? Can I grind down the calipers? Suggestions are greatly appreciated.

Thanks.

Vince

I would'nt grind the calipers are you sure the inside of the 15" rims are the same as the 14" I've also got factory disc on my 68' and they are 4-piston Doug

The rims need to be for disc brakes to clear the calipers. I bet they are for front or rear drum brakes. However, I had to grind a small spot on one of my calipers to clear a casting mark on the caliper. Afterward it caused no problem.

Steve

Gentlemen,

I got the 15x7 wheels off a '73(?) Grand Prix SJ that had disc brakes, but they were single piston calipers. Due to my frustration I busted out the angle grinder and went to work. I only had to take off less than 1/10 of an inch. I felt ill as I was grinding away at my $200 a piece calipers, but that quickly faded when I was driving my car yesterday afternoon.

Thanks for the advice.

Vince
'67 400 convertible (finally on the road)

I had the same exact problem with my 67 mounting 4 piston calipers with 15" rally II's.....I ground down the casting where it was hitting - more than 1/10 - probably more like 1/2 to 3/4's but it was on a very thick part of the casting.....Also bought a couple of wheel spacers from JCwhitney that are 1/2 thick and voila - problem solved....
I think the set of calipers must have come from something other than a firebird - couldn't tell they came from FRANKS POntiac parts years ago and I forgot it was so long ago.

I agree with the last post that the 15" rally II's must have also been from a drum brake car because the offset from the base of where the lugnuts hit the disc to the spaceing behind the spokes was not very deep. 14" Rally II's came in two configurations one had a much deeper offset than the other - the depth of the spokes was very flat on the drum brake style and very deep on the ones that fit the discs.