I'd like to put a R5/R6 P7 combo together at some point. Personally I'd like to see someone use a pro flight trans or a clutchless 5 speed. Even a 904 would be much better then what most are running. That right trans would really help the combo out. A good well sorted out chassis as well is just as important. I'd also would prefer a sheet metal intake manifold then those cast manifolds they sell. Might be easier to get but not better for making power. Also as mentioned before a lower rear end gear. That's just the natural habitat for a small block. Just some small changes would take these motors from running ok to running great.