Dana 44 is the one GM sold over the counter for the F Body guys .. (they should have used them in the TTA ) bolt in no brainer ...lot stronger than the one they used in the poor TTA ... oh the 9" Ford is a bolt in to ... Dana 44 has 331 gears ... 9"Ford by Moser with back brace .. 31 spline axles with 1/2" wheel studs .. Currie center section with 350 gears with a traction loc ... drum brakes but can be converted to the TTA stock brakes with the 2 caliper brackets from Currie or just machine yours .. 1350 yoke .. also have a Denny's alum matrix driveshaft for the Ford rear end.. open to offers but not giving it away .. selling off my TTA stuff so I have room to store them if they don't sell Also have tubular lower control arms as well as an adjustable panhard bar for TTAs