so how would this engine work with turned down 440 crank, 383 rods, the mentioned ross pistons. and stock 906 heads? would there be any detonation problems on a 9.5 motor with a smallish hydraulic cam? thinking about doing my engine in my ragtop like this but it has to have its stock heads etc as the car is #,s matching and 1 of 24 made.. lmk a good combo for a reasonable idle [can lope a bit] and the darn factory BB A body manifolds! thanks dan