Need some opinion's

[Venomous 98]

this all the mod's i got on it right now,JE forged pistons,JE forged I-beams
BBK Cold Air Intake System ,BBK Twin 65mm Throttle Body,BBK Long Tube Headers,BBK Short H-Mid Pipes ,Flowmaster 40 series 2-chamber mufflers
MSD coil packs,act clutch,it has 48,000 miles on it,right now it was dyno'd at 340hp, i want to get at least 500+

[Boosted46]

this all the mod's i got on it right now,JE forged pistons,JE forged I-beams
BBK Cold Air Intake System ,BBK Twin 65mm Throttle Body,BBK Long Tube Headers,BBK Short H-Mid Pipes ,Flowmaster 40 series 2-chamber mufflers
MSD coil packs,act clutch,it has 48,000 miles on it,right now it was dyno'd at 340hp, i want to get at least 500+

Well that's a horse of a different color. lol. Considering it's a pretty stout motor I'd say step up to a D1SC (go 8-rib & 3 core IC) and that should easily get you where you want to be, as well as leave room for more power in the future. You could always go the turbo route too... It really just depends on where you want to draw the line. Personally, I had a Procharger and am now in the process of going turbo (very common transition). Your budget should be plenty to do either, especially if you install it yourself. Just my $.02

-Rob