Ive a pristene 84 z28 5.0 h.o. low miled, super compression, with edelbrock, performer intake, 600cfm edel, cam,lifters also edelbrock, Accel ignition, shorty headers, 2.5 exhaust and no emissions controls of any type plus 3.73 rear, 700r4 trans can someone give me a fair idea of the horsepower made with this combo??

 

You probably picked up 10% each with the intake/cam, and headers. But, you're probably still limited by the 2.5" exhaust.

The L69 was rated at 190 HP, so you're probably in the 225-230 range now.

Fix that exhaust, port the heads and increase intake size to 1.94, put a better cam in, you're probably in the 275 or higher range.