I'm going to suggest, when shopping for the replacement, research mid 80's to mid 90's lugged steel quality bikes (Bridgestone, Fuji, Nishiki, Cannondale, Haro, Trek,....) lugged steel has a flexibility in the brazing joint that welding can't match, it's been proven to be a stronger/lighter connection than straight tig welding.If not that, there are new "Sun" bikes that are meant for the Clydesdale rider, you are in that category.
No Huffy/Murray anything, but I guess you know that now.