383's a great motor & you can stroke them to 426, but I'd save it & build a low deck 400 stroker. Either 451 or 472 & kits are available from many vendors like 440 source, Hughes & muscle motors. Use the RPM intake & thunder carb & headers & paint it to look stock. 400 blocks are cheaper & stronger than a HP 440 block, too. That'll give you the stock appearance w/ tons of power. Good luck whatever your choice is.