Sorry I forgot to mention that it's a stock OMC Cobra with thru-prop exhaust. Would love thru-hulls but just not practical.

76GMC1500 - You stated "I see no reason why this setup couldn't spin the prop faster than the stock engine." I agree, so what's missing in the picture? It's 33 more cubes, 30 Lbs lighter with the Edelbrock intake, ported & polished etc. No rev-limiter. Maybe my stock point based ignition or coil isn't up for it? I don't mind making some changes as long as I'm not throwing another G-note at it "in hopes" of squeezing just a drop.