If your not using the BB Chevy rod journal sizes and Chevy type steel rods and you are using the stock type Mopar rods you may have a problem with the block clearances and the stock type windage tray clearing each other scope
Assembled carefully and inspect to make sure, grind as need for clearances scope wrench

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)