If you want to use your stock SB the most HP/TQ you can make for $4K is:
Basic clean up porting via Al Papitto ($750) on your stock heads. Includes short turn, exhaust work, milling for more compression, Serdi 5 angle VJ with hand blend, and assembly.
FR500 cam/VT kit ($1500) includes new springs/valves good to 7700rpm, billet cams with .472" lift and 204/214 @ .050 duration.
Ported 99/01 Cobra manifold, or a hacked ported Aviator manifold.
Basic clean up porting via Al Papitto ($750) on your stock heads. Includes short turn, exhaust work, milling for more compression, Serdi 5 angle VJ with hand blend, and assembly.
FR500 cam/VT kit ($1500) includes new springs/valves good to 7700rpm, billet cams with .472" lift and 204/214 @ .050 duration.
Ported 99/01 Cobra manifold, or a hacked ported Aviator manifold.