[JM 35 Sedan]

I also made a flat plate from 1/2" thick aluminum. I used an intake gasket to determine length, width and bolt hole locations. Also drilled and tapped ~ 12 equally spaced holes in the center line (long ways) so I could position heavy duty eye bolts to give different lift points according to where the center of gravity happens to be when lifting different engines with or without transmission attached.
There is also a very nice commercially available engine lift that has four chains and a threaded crank mechanism for adjusting the lift point of the load as required.