1. No rocker arm stoppers. No way.
2. STG 3 cams REQUIRE Springs and Retainers. No if's, and's, or but's.
3. STG 3 cams NEED cam tuning with adjustable gears, or your powerband will be off. I made peak power at the rev limiter set to 7800rpm, and after raising the rev limiter to 8500 made peak power at 8500.
4. STG 2's are great for boost with small turbos and don't NEED S/R, though it's recommended if you're revving to the moon (8Krpm +)
5. Leave everything stock, slap a GTiR T28 on it, raise the boost, and tune. 300whp is EASILY done with this.