OK - so that makes it more complicated. Could you get a junk OE pump & cut it up for parts & graft 'em onto the Saginaw?
BTW my machinist friend runs a CNC development/production shop: once they get something right the 2nd & subsequent ones are easy. Maybe you & the Spook could find someone like him in Spokane so other folks could just order it from them. They could do the "custom" stuff & the 62 owner would supply the rest from his old OE pump.
I'm sure there is a place like that in Spokane, but I haven't found one yet. There's a great fab shop near my folks' place in Mill Creek (over west of the mountains) that does stuff like this all the time, and specializes in Cruisers (one guy has done literally almost a million dollars worth of work on some rich guy's 62, which is amazingly badass, but never even leaves pavement ).
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