I will be putting a 383 in my 89 IROCZ here in the next few months. I plan on converting the pre-87 block to a roller setup. here is what is going into the constructon of the block:

Eagle H-Beam 6" rods
KB domed hypertuectic pistons 11:1 cr w/ 64cc heads
AFR 195 cc heads with hyper rev kit
Holley Stealth Ram intake
58mm throttle body
Full length headers with X-pipe and flowmater 2chamber delta flows

I really want this motor to make aot of mid to upper rpm power. I will be driving this car occasionaly from work and back and cruising street on the weekends when I can I want this motor to pull to 6000 rpm too. Thank you

Give Comp Cams or Crane Cams a call... they can give you a much better answer than any of us can.