There is SO MUCH shitty information in this thread. heres my .02:
Camshaft wise, there are only 2 companies i would look at, Skunk2 and ROCKET Motorsports. Both of them are FAR better than any JUN cam. JUNs are nice camshafts an make power, but i GUARANTEE that any PRO or M22XX cam will DESTROY Them in the midrange power. are ytou guys building street cars or drag cars. AREA UNDER THE CURVE is what you want, having run both RM and S2, and seen an spoken with COUNTLESS people on other camshafts, i still stand behind RM an S2. Toda is overrated IMO. I have seen them make power, but their price steers me away.
I have 2 cars with M22s an OEM bottom ends making over 185whp. I have 1 car with OEM bottom end making 203whp with Pro1s. My car makes 237whp with Pro3s.
Skunk2 is overrated? so i guess holdingthe WORLD RECORD ALL MOTOR CAR at 9.6 seconds in the 1/4 means they are overrated

Go look at what all the NDRA and big boys are running, its the PRO series, including Jason Hunt an Jim Justices clients.
If you have a stock GSR, i would spend the money on a RMF header (or one of ours) and ITR cams. The PRO1s are a good choice, but youll ahve to switch valvetrain, youll HAVE TO HAVE something to tune with, otherwise it wont idle and it will run like shit with the huge primarys and secondaries they have.
With ITR cams, RMF header, and a decent tune you should get in the 170whp range which is ITR power. PRO1s should only be considered if you have Uberdata already, or something to tune with, and if you got a good header already. youll see more power from a good header than the PRO1s, and the header is a bolt on affair.
Price Break Down:
RMF header $700
ITR CAMS $300
Uberdata and ECU and Conversion harness $270
TOTAL:$1270
PRO1s $590
Valvesprings and retainers $300
Uberdata and ECU and Conversion Harness $270
TOTAL:$1190
I would go with option 1. Option 2 will never make the power without a header, plus its MUCH more labor intensive to install valvesprings an retainers. youll have to have the SNAP ON spring compressor to do the springs an retainers on the car, and i dont recommend it for an average mechanic. If you have the money, do option 2 and throw a header in, but it sounds like you only have enough money to do one of the other, thats what i assume.
but what do i know, im only the highest whp car in the state
