Engine runs fine but seems to seize after wot

Fuel pump is fine. I can turn the key to on and it fills the bowls and squirts When I press the acc pump. Think of it this way. Let's say u have a manual trans And u start your car and butt up the front bumper to a building. Now put it in 3rd gear, hold the brakes and keep parking brake on and me out the clutch. What happens? It dies instantly. ( cue smart comments) now obviously no one would do this. Keep applying the brakes with the vehicle in gear try to start it. Nothing Happens. Now have some friends help u push it away from said building. Put it in neutral And start it 3 hrs later. That is the indications the car is having

Nothing happens? or the car jumps a little but the engine won't turn over?
It does sound like a bad converter from that description.

Excellent description.