I swapped a 12b into my '90 1/2t sub w/TH700R4. It previously had the factory 10b. The u-joint on the dshaft is larger than the 12b yoke will take. Is this a 1330? the Sub is all stock 'cept for 2" susp lift. The GRVW is 7000lbs if it matters. tHe 12b is out of a '73 4spd truck .