another 383 build up Q

With that kind of coin to spend, I'd trash the 383 and get a 400 block, stroker assembly and get 500 cubic inches for around the same price. A lot easier to get 600 hp with 500 inches. Not to mention high compression pistons for a 383 are always custom made (expensive). With 500 inches you could possibly get that 600 hp and still use pump gas. That's what I'd do if I had 10k for a motor.

don