Correct/Original Rally II Rims on 1968

Q: Correct/Original Rally II Rims on 1968

I’m interested in putting Rally IIs on my 1968 (Verdoro Green – a great color) with factory power disk brakes. I understand that only a certain code will fit otherwise the wheel hits the caliper. Ames said it was code J0. Does anyone know this for sure? How hard is it to find them?

A: ..For many years, people and resto guides have been passing around the wrong info when it comes to the Disc Brake Rally II Wheel. For the GTO, the correct code is “JA” For the Firebird however, the code is NOT “JA” but instead, “JC” which is also the same for Drum Brakes. That’s right, you don’t need a special Rally II for Disc Brake Firebirds. Here’s the proof….

• 1968 Service Manual lists “JC” as correct for the Disc Brake Rally II

• Broadcast Sheet lists “JC” as correct for ALL Rally II applications

• The Parts Book (dated 1969) lists “JC” as correct for all 1968 Firebird Rally IIs

I’ve inspected several original unrestored 1968 Firebird’s and found “JC” wheels on all of them. There is a different wheel if you had wheel covers. That is “HK” comapared to the standard “HG” rim. I have an original 1968 Firebird that came with Disc Brakes and Rally IIs. The rims I have are all “JC” and I don’t see any clearance problems. Sure, you can pay the extra money for the “JA” wheels but you don’t have to and besides, they’re not even correct. Even the latest “FIREBIRD DECODING GUIDE” by Thomas DeMauro (HPP) lists the wrong code. Infact, they don’t even come close as they list “HK” for the DiscBrake Rally II wheel. So, for 1968 Firebird’s with Disc Brakes, look for the “JC” rim. It’s documented as correct and it’s much cheaper than the “JA” that all these used parts dealers sell thinking it’s the Disc Brake Rim for all 1967 / 1968 Firebirds/GTOs

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