Update: I lowered the secondary fuel bowl level. That helped a lot. But I then had to raise the primary fuel bowl level. Then we used a base idle of 1000 rpm to see what happens when you put it in DRIVE. Well, it dropped down to 450/500 rpm, stabilizing at 510. So just putting it in gear caused a 500 rpm drop, so idling at 650, it drops so much, the engine dies. While in gear, brake pressed, I upped the idle speed. It would not get past 550 no matter how much I raised the idle. It felt like the trans was locking the engine down. I then adjusted the idle up and down, and found the sweet spot, at 950rpm, where the engine did not die in gear, the vacuum was 18", and there was no timing advance occurring. Driving it, the engine roared, did not die at a stop sign, but still idled rough. WTF?!?