I have a set of SM420 mounting bolts (with heads cut off). One that screws into the upper left of the clutch housing, as Denny describes. The other screws into the bottom right of the transmission (facing the clutch housing, on the lower diagonal from the bolt that screws into the clutch housing).
This works quite well. I/we have done the removal/installation from above (by hand and with a hoist) but I find that doing it from below, with a jack under the transmission, is easier for me.
Denny, what brand and color paint did you use to paint the transmission? I still cannot decide if I am going to leave drive-train parts au naturel (transmission and torque-tube/rear-end), or paint them?
Thanks,