(Aaaargh! Lost my post!)
Thanks for the history tip, myv65. Thank you BillA, for the o-ring specs, that was very helpful!!!
I found the
Socket A specs .
It is 52.4 mm wide, by 65.5 mm long. As far as I can tell, the clearance between the surface of the mobo, and the top of the socketed area, is 5.50 mm.
It is longer than wider because of what is called the "cam box", which is where the lever mechanism sits. There is a prescribed notch to heat sinks (those that lay over the cam box) in the order of 2.0 mm.
Prescribed clamping pressure, which should be in fact longitudinally applied (so the Paul Vodrazka mount is out of spec) over the core, is between 12 and 24 lbs f, typical 14 to 18, nominal at 16.
I'll try to find a reference to the relative bolt hole position.