old 340 stroker crank

340plot said
right, but would this put the piston up out of the bore too much? and lets say if a stock 340 is 275, whaat does this add. hp, or torque? ill go to chat s.s if it is easier to explain there, so we do not get yelled at for talking out of turn.lol

Use 360 pistons, but sized for the 340 bore. It won't put the piston in any different position than a stock 360.