on my st205, the distance between cam cover and crank pulley is 50mm.
We laid some carpet down, tipped the engine, rested the crank pulley on a piece of 18mm mdf under the carpet and then rested the cam cover on a plank that was wider that the cam cover to distribute weight which was 18+50mm high.
Scary thing is to tip the engine on its side without damaging the oil pan. We doubled the carpet to provide a rolling surface.
then we hung the transmission over with an engine crane and engine leveler, got it about right and placed the shaft into the plate. Then we lowered it down and it got stuck on the mounting boss on the case.
I grabbed the angle grinder and got the guys to hold it while I ground the mounting boss off.
We then went again and it was a little stuck. Jonno rotated the transmission a little and knocked it and it went straight on as the shaft must have had to rotate a little to get it in line - and it came down fast due to gravity!
Do not put your fingers between block and gearbox when taking slack off crane!
The mounting boss is the main issue I had. It interfered with the transfer case no end and gave me multiple issues.
Failed way - as you can imagine, I was pissed off with it trying this way for hours.