There are several different stock NP 833 bell housing sold on the cars from Mopar during the production runs from 1964 to the end of them being used in 1976 to 1979 confused scope
They made them in cast steel and cast aluminum, 130 tooth with 10.5 inch clutches and 143 tooth flywheels with 11.0 clutches. They also had several different front bearing retainer sizes, biggest for the O.D. tranny, regular size with the 307 bearings and bigger hole for the H.D tranny for the 440 and Hemi motors with the 308 front bearings scope
good luck, take your time to get it correct the first time thumbs

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