Small block and 727 Install

Here's another question, lol. If I lift the engine and trans as a unit, will the lift plate that replaces the carb hold it? Four 5/16 bolts in aluminum isn't inspiring me.

Just the engine, I trust. I don't know about the engine and trans though.

I'll bet I did it when I was young and dumb(er) w/o thinking twice.

I'll google around and see what a 5/16 bolt will hold.