I might have the Muncie and Saginaw 4 speeds in mind, not the 318 and 319 3 speeds. I remember having to use bolts and nuts on some applications due to the lack of threads in the lower bell housing bolt holes or the transmission cases.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!