If you have access to a good crankshaft grinding company you can have the crankshaft offset ground to BB chevy rod journal sizes and make the stroke grow to 3.910 or 3.900, depending on if the crank is stock Mopar rod journal size now or if it is ground down to .010 under. That allows you to buy a decent forged piston from KB and use a 6.585 long BB Chevy style H beam rod for a decent price This combination will make the motor 464 to 471 C.I. depending on the bore size, this was a common way to stroke a Mopar before the price of stroker crankshafts came down. The increase in stroke really makes the motor wake and act like a big dog It ends up making a lot more torque as well HP