Give him a few hours!

The engine will need to slide forward a few inches before lifting it up - to allow the 'tail' of th4e TC to clear the front end of the transmission (it reaches in and meshes with a pump). Pulling the motor up too soon can cause damage.

Another approach might be to pull the trans off the motor. You need to undo all the bellhousing bolts either way - but it might be easier to pull the trans off the motor that way vs. pulling the motor forward enough to clear. Just need to undo the driveshafts/trans wiring/shifter/etc.

As asked above - what was the situation when the motor seized? If you were driving along and it ran low on oil/oil pressure and ground to a halt, then you're going to see lots of shiny stuff when you drain the motor oil. Which really nails the 'it's the engine' diagnosis, and I'd proceed to the ideal above of taking the oil pan off and loosening rod and (maybe) main bearing caps until the engine will budge, then taking the TC bolts off the normal way.