Hi,
That is a very good question. I've always pulled the unit. However, you could loosen the transmission and hopefully get enough room. The only thing is to make sure both the engine and transmission are supported.
Also, a standard freeze plug will require being tapped in with a hammer. If access is limited (and I suspect, it will be) they make a rubber one that you tighten with a nut on the freeze plug. That may be what you need. It will be much easier getting a flat box end wrench in there to tighten the bolt than using a hammer. It's just a thought. I attached a pic below showing what I'm referring to.
Let me know if this helps or if you have other questions.
Take care,
Joe
See pic below.
Image (Click to make bigger)
Wednesday, September 21st, 2022 AT 5:42 PM