I am considering updating my SBC 350 in my boat to a 383.
It's already bored 0.030 over and has vortec heads on it and a roller cam.

I would like to replace the rotating assembly with a Stroker Kit.

Not looking for tons of HP (350 would be fine), more interested in torque.

Any suggestions on the rotating assembly? Want to keep compression down to use 89 octane.........gas is expensive on the water!.

How about the machiningclearancing? Can I do this myself with a hand drill? The engine has very low hrs on it so the cylinders won't need to be touched.