I just got finished dropping one in from the top.

I supported the transaxle on a jack.
I pulled the Driver's side tire off and removed the transaxle mount completely. This gave me enough room to push the transaxle to the side.

Dropped the engine in without the intake but with the exhaust, belts & accessories.

It is easier if you have a jack that will keep the transaxle from rolling forward or backward.

Never tried it from the bottom.