muncie behind 440

several articles I've read (years ago) said the factory alumium case used (around75-'76) in the 833OD for cars like the Feather Duster (yeah..right) had problems..primarily with the bearing supports

Right. My understanding is the counter shaft boogers the case up and requires a bushing to repair. That is why "I" would look for a cast iron case......and why I actually have one. Thanks, Sheldon!!!!!