‘71 340 Duster Front Drum to Disk with Factory 14” Rallye Wheels

‘71 340 Duster Front Drum to Disk with Factory 14” Rallye Wheels - Problems

JimG said
I was in error on the caliper brackets. These were included in the kilt and used. I installed these months ago ands simply forgot.

Cass responded and said that these wheels are not factory, and that they have a different offset and taper. I am very surprised by this, but you guys are more knowledgeable than me, as this is my first Mopar after years of Chevy. That said, I trust they are indeed not factory.

I am now reluctently considering aftermarket 15x6, 4”BS, 5x4 BP wheels. My intention was to use the 14” Rallye’s. If I would have know that these wheels would not work with the kit and that I would need to go with 15”, I would have upgraded to a better option that Cass has available.

I do want to be clear about this….Cass has been an excellent source of information and great to deal with.

Here is his response:
Hi Jim,

With the exception of the rotor bolt pattern and register diameter, the brakes are reproductions of what '73-'76 A-bodies originally came with including cars optioned with 14" Rallye wheels.

If I remember correctly, I trial fit an OEM 5 x 4" bolt pattern Rallye wheel a couple years ago. Unfortunately, my order of 5 x 4" brake rotors is in transit and I don't have one in stock to confirm fitment.

Looks like you have aftermarket Rallye wheels, however. The inside profile of the rim is not the same as an OEM 5 x 4" bolt pattern Rallye. In addition, an OEM wheel also has 3 3/4" backspacing. What is the distance from the outside edge of the rim to the contact surface?

Cass

Yeah, I have to say your wheels are definitely not factory. I'd say that @junkyardhero is right on, that "8 29 02" stamp is production date.

And the factory 14x5.5" rallye's having a backspace of 3 3/4" vs the 4-1/8" your wheels have would probably mean the factory wheels would clear those brakes.

Definitely a bummer you went with the stage 1 brakes thinking it would let you keep the wheels you've got, totally understand that. And I get upgrading the brakes further if you knew you needed to get new wheels anyway! Makes perfect sense.

Have you asked Cass if he might exchange some of the brake parts you have toward the other brakes you wanted if you're buying new wheels? Because if you're talking about going to the Stage 2 brakes, only the rotors and caliper brackets are different, and those aren't used yet. Obviously I don't know for sure but it might be worth asking.