Stalling at idle in gear

Well, I tried a few things and here are the results:
Vacuum at idle = 15 inHg
Vacuum in gear = 10 inHg
Timing = 14 Degrees advance initial, 34 degrees advance total (@ 3000 rpm) - Dead nuts on what the booklet that came with the crate engine says it should be.
Fuel pressure was steady at 5psi.
Fuel levels in the float bowls was right at the bottom of the sight holes the entire time.
I let the engine temp get up to 220 then drove it around the neighborhood a few times, totalling 8 miles. Engine temp never got below 210, and I made some hard stops trying to flood the carb, but no dice.
The thing never stalled, never even hiccuped. I got on it hard and then slammed on the brakes but nothing.
I never cruised long enough to feel the converter lockup, and with all this today I'm really thinking the fuel system is ok, and the converter is still the issue.
Current converter stall is I think 1800.