I have the GMPP 290HP engine and I'm wanting to put roller rockers on it and I was wondering if it had screw in studs or press in studs for the Rockers as well as if it had the 3/8" or 7/16" studs. I've also heard that I need the self aligning rockers is this true or can I use the normal rockers?

press in studs
3/8" studs
use self aligning rockers with press in studs or "pinned" press in studs
use regular rockers with screw in studs....

I called the guys at Summit and they said I could use regukar rockers... but I'll check tomorrow