I was taking the bolt from the top of the bell housing on a 2.6
Tried to do it from under the truck, but my air wrench would not budge it.
Finally took the hood off the truck. Put a 14mm box end on it. Put a three foot piece of pipe against the end of the wrench, and hit it with a BFH.
I have removed quite a few of these before, But this one was one tough piece of $#!%.
Once it broke loose I was able to remove it with my fingers.

Well on my way to becoming that eccentric old man in every town.(crazy as a s#@thouse rat) With a yard full of desireable old vehicles that tells you, Sorry they're not for sale..... Someday I'm going to fix them.