Resolved, replaced both converters. Thanks Brusbrother. Got this car from Georgia for my daughter, so it's rust free, I'm sure you can appreciate that. Concern is what caused this and hoping it doesn't destroy the new ones - oil level was increasing and bad mileage, pretty sure running rich. Found and replaced one cracked injector while chasing the clogged converter issue. Time will tell.
Runs great, looks great, ready for college next year, she got a free ride at her top private school pre-med and was the first player in school history to be named first team all state twice as a junior and senior. Not bad from a rural public school with very poor academic options. /end proud dad brag