I have a guy wanting to trade me a full LS3 topend with LS3 intake and 90 MM TB for my PRC 2.5 LS6 heads i just bought. Now i relaly do have the option of installing either top end. I am so back and forth on this. When i get peopels opinions it seems to be a pretty much 50/50 split on what to do with the RX7. I woudl do the LS3 topend, i am jsut afaid that it will make it less peppy down low off the bottle. Ugh. why are decisions likethis never simple.