When my tranny goes back in I'll test fit it again it was held cocked by the block. (it's been welded ) a freind ground his block then no more ring gear teeth off. I put my trust old (1991) MP one back on. i think the holes may need to be clearenced to the inside a bit and maybe a little grinding on the block???
I did notice it pulled up [Edited by Moparts - Keep it clean] before real tight.
It left a mark on the old block where it was tight so I know were to look for tight!!
this time I'll spend some time on it.