Easiest method to remove tranny/engine bolts

Leave the trans in it unless it needs work too. You can support the trans using a ratcheting movers strap slung underneath the trans and either around the T bars or across the engine bay with a 2x4 spanning the fenders to support it.

I've found a combination of either a flop head 3/8 drive socket wrench or a plain old box wrench works fine to get the bell housing bolts out. A flex head ratcheting box wrench as mentioned above would be nice too. No big mystery getting them out, just a little patience. You should have guide pins in the engine block to locate the trans for assembly as far as I know.

Have fun !