Four bolt mains

I think Chevys might really need them . Machinists I´ve talked to says mopar blocks take more effort to machine . mopars are harder . And L Shepard says mopar blocks are made from the good stuff in comparison to others . I am aiming for 500+Hp. So I´m Ok . Just like to hear folks input on those Milodon ones.

I agree. Although there are a FEW Chevy casting numbers that are considered high nickle content, most all the Mopar stuff was.