Yes, plus ALL of the early "oddball" 8 3/4 rears like from the early 60s on back were 741s as well, even though they sported different casting numbers. They were all the 1 3/8 pinion stem. Also, the Ford 8.8 pinion shaft "I believe" is smaller at 1.320". I could be wrong about that, but for some reason, that sticks out in my feeble mind.