Stop in for a cup of coffee

Well finally got a call on the mystery distrib, guy was refereed to me at Chargers.com. No wonder I had no clue. Trusting guy there. Super rare distrib in almost no books not even the Gavin Gullible books. No prefix letter listed prestolight books. IBS 4014G 69.5 440-6 MT. Have it done now, thing was a rusted mess. Actually had the right rebuilt vac advance for it somehow!
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That vac advance looks very much like the fargo one.
Hex fitting was loose, i looke inside, i guess thats how its calibrated, adding or removing shims.
If i leave mine connected, it hunts. I checked timing and set it around 8 degrees, connected advance and a minute later it started surging. Pull vacuum hose and it straightens out. Guess i need to vacuum test it.