This past weekend at RCX I met a gentlemen from Associated and we talk about a Pro-10 cars and how popular they were in Europe and Asia and how they were replaced by the touring cars here in the states. I had mentioned how I was using the Full-Option conversion kit on my R5's and he suggested that instead of using the CRC wheel spacers for the rear end, to use the combination of a R5 oval axial and right differential hub with the IRS's tallest left hub and I would cut down on all that rotating mass of the CRC spacers and additional hardware. Please see photo below...
I happen to have a RC10L axial that had been cut down and RC10L3O right hub (P/N 8459), so I ordered the left hub (P/N IRS220) from IRS and it arrived today. I suppose if I wanted to use the newer "D" rings, I would have to stuck with the R5 oval axial and right diff hub.
You can see compared to the CRC spacers that now I'm slightly more narrow that before, but if you take in consideration the weight and rotating mass loss, I think this is the way to go.
I would like to personally like to thank Mr. Don Natale from Associated for all his help and insight with the pan car knowledge.
R_