I don't know if you are aware of offset grinding the stock Mopar rod crankshaft journals from the 2.375 size to BB Chevy rod journal 2.200 and increase the stroke from 3.7500 to 3.9100 or 3.900which allows you to run a lot better price BB Chevy H or I beam long rod like 7.100 length that is a lot lighter and it uses a lot light smaller .990 wrist pin. Many of the good piston companies make a shelf piston for this combination also
You could end up with a 464 to 471 C.I. motor depending on the final bore size and stroke length
Those motors flat rock, they don't make as much HP or torque as the longer stroke motors make but they do make what I consider a lot better than the stock stroke and heavy pistons and rods do
I need to warn you though that I like speed and power, a BUNCH