Well just dropped off the 383 at they machine shop and will run it on the dyno tommorrow night. Who can run some desk top #s and see how they compare to the actual #s. Specs: Bore/stroke: 4.030/3.75" CR: ~10:1, Keith Black hyperutectics, small dish. 5.700" rods Vortec heads, stock ports, 1.94/1.50" valves Cam: GM roller "hot cam", .525" lift, duration@.050 218/228, 1.6 roller rockers Intake: performer RPM air gap Carb: Holley model, O-80508S, 750 CFM, dual feed, vacuum secondaries. Hedman headers with stepped primaries and 3" collectors, don't know primary sizes but would guess initial size 1 5/8" stepped to 1 3/4. Forgot to measure them. Any guesses on HP/TQ?