Does your bell housing mount look like this one?
Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists
That is the correct one for a '72 and up A Body. Yours looks to put the ball above the top bolt, which would cause an angle.
Brewers also shows a '71 down mount that might be what you have.
Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists