bigger rear disc in rear than front a problem I assume?

72bluNblu said
So, the reason why I said they shouldn’t fit is because Wilwood says they shouldn’t. This is the instruction sheet for that kit

View attachment 1716185465

The diagram indicates the base radius of the hub snout is 3.24”, and the instructions say the minimum hub bore for the wheel should be 3.24”.

The minimum hub bore on a set of Mopar cop wheels is usually somewhere between ~2.8” and 2.9”. Less than 3” certainly, at least all the ones I’ve seen.

So, my concern would be that the hub bore of the wheel is sitting somewhere on that radius, and that would mean the wheel wouldn’t be sitting flush against the face of the hub, and that the lugs are distorting the wheel to clamp it all together.

I haven’t mounted them up, so I can’t say for sure. But that combo doesn’t fit according to Wilwoods instructions.

I have Wilwood IMO rather generic alum hubs on a few of my cars. I have a very low affinity for their robustness.
The Dr Diff Alum Mopar Hub is far superior strength wise IMO. Unfortunately, both are stuck with a lame bearing size for any HP track day use, again IMO.
Keep in mind, alum loses 50% of its strength at fairly low temps, and few cars here make much attempt to supply additional cooling for often undersized front brakes in the first place, meaning hot hubs.