Anybody know if I can run PRC stage 2.5 with 2.02/1.575 on stock LS1 without having to flycut? Or would I be better off just getting the stage 1 with stock 2.00/1.55 valves?

I'll be running a TSP 228R cam (228/228 .588/.588) with a fast 102/92 combo.

 

Should be fine as long as they're not milled down a lot. A buddy of mine is running them with a much larger cam and milled down to 62cc chambers with no problems