Lex
Between your scans and the scans on Jerry Greer's site, I think I have it. His site is especially valuable since he gives a lot of dimensions of each part as well. My two "rods" may have just been a production convenience. Far easier (and cheaper) to make a long rod threaded on the ends than to make a long hex headed bolt.
I see he has a reprint of the manual for the 640 with serial numbers just ending before the Canadian numbers. I'll get that ordered this week.
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