383 & 350 both use the same block...so why the concern about 4-bolt mains on the 350, but not the 383?
I kinda side with Pope ....if I have a 350...& I have to buy a crank & pistons anyway, for what ever reason...O.K., than Id go ahead & make it a 383.....if I had a good usable crank & pistons that suit my needs ,Id keep it a 383. John