C3 build
#342
Me personally I would probably shift a 6500. Thats a cam with a decent amount of lift, then add boost on top of it, thats a lot of stress on youre valve train. If you go to a 3.85ish pulley you should be able to make the same boost at a lower rpm. Thats just my thought though..But if you have light valves and good springs with a decent amount of seat pressure you should be able to shift at higher rpms.
#345
Valve control wise the change in cam wont make a difference. You might want to swap to the smaller cam though to get more low and mid range since the procharger will carry the power on up top. I would get the procharger running great first, a new cam would be one of my last mods. That converter will probably need to be tightened up a bit with the boost.



