Just wondering what kind HP would i exspect from these bolt on for my 89 5.0? I have the following: B303 cam, Edlebrock performer rpm head, full mac catback, bassani offraod xpipe, mac shorty header, 373 gears, shift kit, 73mm mass air, 24lbs enjectors, 70mm throttle body, fuel pressure regulator with fuel gauge, 2800 stall, mac cold air intake, and typhoon upper and lower intake. I was wanting know what kind of HP i would get with and without dyno tunning.

 

who knows, just go have it done, 260'ish maybe