My fix was almost too easy - along with pulling the secondary idle air bleeds (and at the time I reasoned through why that helped the lean problem, but can't recall now), I also richened up the idle mix by turning the screws on both sides out 3/4 to a full turn, if memory serves.
Went to start up the car, fearing that I'd burp another fire ball. I pumped the gas twice, counted to 5, and then turned the key, ready to lunge for the fire extinguisher ... and the dang thing started up like it was warm and fuel-injected!!! That freaked me out so much I shut it down. It took another few seconds for it to register that the car had actually started instead of imitating godzilla.
I did start it again, and put the air bleeds back in, and it still started and ran just fine, right up until the HyFire died. Now I've got holes drilled in the firewall, an MSD 6AL on the workbench, and no idea when I'll get time to get back to her.
Best of luck with your car - all the time I was trying to figure out the problem, I always assumed everything was too rich, and it turned out the problem was it was too lean. It may be that if you take a look at iyour issue from the opposite end, you may see something that will help!
JLW