I'm doing a 383 for my Duster. TRW 12.5 pistons .030 (new on ebay for $160) uncut 452 heads works out to 10.7:1 with shim gaskets. Big valves and pocket ported. Comp Hi energy solid 284- .520 .540. Eddy RPM, 1.75 TTi headers. Should run pretty decently.
