Ok what should I watch for ?
Pull the air intake and tape off the inlet.
Drain the block.
Use chock blocks because of the driveline brake.
But what other tricks should I do and watch for when pulling the 4BT?
The only other thing is be prepared to plug the fuel line if you have not drained the tank. I have had a few vans that had the tendency to siphon. Just like pulling any other engine except it comes out through the door.