OEM 1966 to 1969 Automatic Transmission Crossmember

I think you’ll find that the spacings to bolt it to the torsion bar crossmember are wider apart on one side for the 66 (and earlier years). I used a 67-72 and modified the trans mounting to fit a 42RH and also had to redrill one mounting hole IIRC on the driver’s side to fit the T bar crossmember