Maybe I'm the last to know about this -- which seems to happen more and more! -- but I just found out that there's a tiny adapter that converts a modern O-ring connected Sanden A/C compressor to the older flare-type connectors!
DISCHARGE (high) SIDE 040-0050 adapter 040-0051 O-ring
SUCTION (low) SIDE 040-0055 adapter 040-0056 O-ring
A lot, or maybe most, of the newer Sandens use #10 hose on the suction side; my 63 and some 80's AMC stuff used #8 on the suction side, so you'd have to get one with #8 suction. Both the old and new that I've seen use #6 hose for the high side.
(I have an AMC-application Sanden I got from a lister a year ago, it's got right-angle adapters on it, I'll look when I get home but they might be O-ring to flare adapters. Those might