breaking in motor w/ no fluid in converter

If you leave it in Park you should be OK. Just dont shift it. Motor can run Fine this way. Remember that if the tranny is in park the yoke will not move and as you say just add the fluid till you have in it what it needs. Good Luck.

NEUTRAL! Torquflites take up fluid in neutral. (It's why the dipstick says check in neutral). Anybody wanna ask why I know this?