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...I ran your specs through the 'DeskTop Dyno'. You can get what you want, provided you use a Roller Camshaft, it can be a Hydraulic! I used the standard sized Valves, I.E. 2.196" Intake and 1.715" Exhaust. Here are the numbers at two levels of comprssion ratio; believe it, or Don't, + or - 4%: Single Plane Manifold with 750 CFM at 11.0:1 Comp. Ratio equals 582HP @ 6500 RPM and 555 Lb/Ft @ 5000 RPM...if you lower the comp. ratio to 10.5:1 the figures come out as: 569HP @ 6000, 546 Lb/Ft @ 5000. REMEBER this is with a ROLLER Camshaft; It makes THE difference. If you use a 'Standard' Hydraulic Cam (with 10.5:1 Ratio), the numbers drop to: 504HP @ 6000 and 497 Lb/Ft @ 4500-This is pretty low on the power band! Anybody else wish to have their numbers ran??...