You sir, have too much time on your hands.
Love your engine holder. I'll have to dig up a pic of my 4x4 treated lumber engine hoist.
Your frame must be different than the Bonnevilles because I can squeeze my trans between the engine and frame.
I find that many smaller 3" -4" extensions instead of one big one allows the extension to "flex" allowing it to sneak into awkward tight spaces like the backward trans bolt.
And I didn't know the standard engine stand could hold a 4T60 like that. Thanks for the tip.