here's a thought, 340 block, 360 crank turned down, 360 pistons .060 over, 372 cubic inches on the cheap. There's your 400 rwhp with the right cam and heads. Best of both, minus the forged crank. Assembly would have to be internally balanced like 340. External balance requires either a b&m flexplate with a neutral balance converter or the weight kit from mopar. also requires 360 damper.
