Well, the Comet is nearly complete. I'm putting D5 351w heads on my 30 over 289. The heads have 1.94/1.60 stainless valves, heavily ported/polished/gasket matched; screw in studs, guide plates, roller rockers, Holly 600/Dual Plane intake (old cobra style). Hooker Super Comps, Crane 512 Lift/284 Duration hydralic lift, Petronix, X pipe. Gear is 350 with 4 speed. Car weigh about 3100# with me in it. Any guesstimates on horsepower/ e.t. potential? Thanks!