Injected carb? The TBI?
-Put a set of Vortec heads on it
-Get an edlebrock performer vortec intake
-A Trans-A-Dapt 2210 adapter
-Get a chip burned for it
-Boneyard 454 throttle body
-a set of long tube headers
-Enjoy
I wouldn't go much further than this with this engine. you'll end up spending as much as an ls swap would cost after a while