The Ford Y-Block (2329/256/272/292/312), the Lincoln Y-Block (317/341/368), and the 289/302 SBF engines share the same basic dimensions on the distributor housing.  The distributor gears are different on each though, but they all share the same pilot dimensions and all use the same ¼” hex oil drive shaft.  The Ford Y and LYB do have longer shafts with them being almost 5” from the block mount to the bottom of the distributor gear whereas the SBF engines are approximately 4” from the block mount to the distributor gear bottom.  Using a SBF distributor requires lengthening of the shaft and using the Ford Y distributor gear.

Lorena, Texas (South of Waco)

Ted - The remanufactured unit I have measures .995" from the bottom of the gear to the end of shaft.  Bottom of gear to the recessed collar I propose to add a split ring to is 4.997".  My next step is to pull my original LOM and do a side-by-side comparison, including gear dimensions and teeth. After that, I'll drop it in to see how it fits into the block and cam drive gear.  McMaster has a variety of materials for the split rings - Stainless, carbon steel, plated steel, aluminum.  I am thinking aluminum.  Once the split ring is installed, drill and insert two roll pins per side into the case.  Turn the split ring down as necessary.  Comments?
Thanks
Mike