340 rear main choices- race motor

New MP block, with an old forged crank. I did not build the motor, it was built by a guy that was a Mopar engine expert here in the PNW. He has since passed..... My assumption is that he did everything right.

The pan is an 7 qt aluminum Charlie's unit, and does not use gaskets. It uses a liberal amount of "Right Stuff" instead.

Thanks for the FelPro part number, I will look into that.