Engine Swap

[rniez]

I am replacing the engine and transmission in a Model "A". In Les Andrews book, he suggests that you should install the transmission to the torque tube (mounted on a floor jack) then install the engine and mate the bellhousing with the flywheel cover.

It seems more intuitive to mount the transmission to the engine and then install the whole assembly. Am I missing something here? What do you suggest is the best approach.