I do mine together, out the bottom
I use 2 floor jacks to raise car, tho one will do, and cradle the engine with jack straddling oil pan and tranny, Then I drop (don't foget to remove cold start cable :oops: ) When engine is resting on jack under car, I place a 4x4 block under front and block up rear, pull out jack, remove tranny block, drop to ground, remove frt block, then slide out thru drivers fenderwell.
Sounds complicated, but... I've done it both ways, and short of doing at my friends house (who has a car lift + a 2 axis overhead crane) (we always do from top there) I prefer the bottom, when working alone.
It is not a big deal either way, and if you use a hoist, a smaller one helps (or a large work area
Hint... Going from the top... remove one hood hinge bolt on each side, and SLOWLY rotate hood back against windshield)