how can i get more power out of me 1990 chevy blazer its got a 350 v8 5.7 liter i got exhaust and air intake and im getting header,chip high flow cat and 3/4 race cam any suggestions? or should i change somthing?

 

Carbuerated or TBI? A throttle body spacer would work well on a carbuerated 350. A universal supercharger, or any other kind of blower would also work great. You may want to try boring it out before you make any engine changes, or drop in a 454.