For now I'll be upgrading to ex-611 springs, rr's. The rr's are nsa.What gp's and rockerarm studs should I use? Motor is all stock from tb to the oil plug. Thanks for any input. I'm wanting to squeeze out any hp\torque I can. 97Z M6 Mac dualcat headers cai relocation brackets & lcr's runlt1z28jake[/PHP][/COLOR]

 

Put the 612s on and not 611s. They give you more room to work with in the future. I'd use 7/16 studs and 7/16 NSA rockers with GMPP guideplates.

 

So Spinner can you give me some part #'s. I'll be staying 3/8 studs & rr's . I do not think I want to go bigger than the cc305 cam . Will the 611 be enough? run lt1z28jake

 

I'd go with the 612s either way. If your staying 3/8 then just get some good 3/8 studs and comp pro mags.