This is a brand new JW Performance 2700 stall part #30442 B it’s 11 inch for BBB TH400 and may also fit TH350 $400 shipped or local pickup in Phoenix area.
I bought this several years ago as a back up to my 1972 GS Stage 1 455 with a TH 400 and 3:42 gears. It has a 2500 stall in it has yet to fail so I never needed this one it just sits on the shelf.