...comparing the Cleveland pump I hold in My hand to Photos of the Windsor 'Shorty' pump; On this Cleveland pump I see 'circle' impressions in the casting, where there are Drilled Holes in the Windsor Pump, and Drilled Holes in the Cleveland pump, where there are 'Undrilled' Bosses in the Windsor, just a Couple. Leading Me to believe Both Pumps started out from the Same Casting!* Most of the Holes are Correct. Seems all I must do to adapt the Windsor Pump is Drill out the Undrilled Holes and make sure the unused holes are sealed up. As reported in some info I have found. Last the Windsor pump, Minus It's Backing plate, should butt right up to the Cleveland 'Timing Chain Cover'.
We'll see and I will report back Soon. Awaiting Delivery of the Windsor Pump.
* Excepting for the (2) 'Twin' Bores on both sides of the Intake Port, of the Cleveland Pump.