Im a Fuc#ing Thickhead!!

If you only filled the converter,, I don't think there'd be enuff fluid to even drive the pump, nevermind anything else,,

I'd fill it and drive it.. if damage has been done,, it's not likely to get worse with lubrication,, if,, after a few miles,, the fluid stinks,, see what's in the pan... jmo .. being so close to completion..

cheers

The pump is directly driven by the converter so the pump runs any time the engine does (fluid or not)

They grease the hell out of the bearings in converters when they assemble them, so as Lance said it's may be just fine.
(BUT) If you heard noises it probably trashed the pump because that is all that would be turning with little to no fluid in it.

The upside is that with no fluid in it, it probably didn't circulate pump metal through the rest of the trans and the cooler lines.

(Pan check)