Yes- - - -there is a big freeze plug at the back of the block that gets rust holes and the only way it can be changed is by removing the bell housing. The engine needs to come out, then the clutch cover and flywheel is next. Change ALL the freeze plugs while you're at it. If one is rusted out the others are well on the way to more leaks.
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!