Chevy rods are 015 wider on the big end, each. I had my rod journals taken out a little wider (1.9 I think with some radius to mate up to the rod) to compensate when turning the diameter down to run the Chevy rods. Maybe the radius on the outside of the rod’s big end rod bore gives room on the standard Mopar rod journal width, but I didn’t want to take the chance. I trust that you’ve built quite a few more engines than me though.