After discussing this with my machinist we thought maybe we use the top 3/8 inch threaded hole
on side of bell housing and 3.527 measurement from side of bell housing to place DEH hole in correct spot.
Is this correct?
Again thanks for your assistance..
That is correct. Do not just center on the existing boss.
ebay is usual source for starters or local starter repair shop.
Try Romaine Electric out of Seattle, Washington for the DEH or your local starter shop. If your boring the starter hole in place on the tractor use the 3-3/4" diameter hole to allow some wiggle room.