Which brand should I go with and how streetable are "stage 2" or "stage 3". What kind of fuel upgrade will I need, if any?

 

do some searching theres a lot out there. what compression, what intake manifold, etc.

M top3 are
1) Rocket Motorsports
2) Buddy Club3s
3) Skunk2 stage 1s

Valvetrain wise, i only run RM . I have m22s RM camshafts. it depends on what you want an what your goals are