Sanity Check: 15-Year-Sat 904 Swap Plan to Get Me to MoParty

What converter? I hope not the one out of the dead trans or that is guaranteed death for the new transmission. No way to flush all the old crap from the dead trans out of there. Years ago there was a trans parts warehouse not far from me that had a machine to flush converters out of the trans. But they're gone now
And those old converter flushers weren't all that good. Flushing with cold solvent only gets some of the junk out.