I sorta finished the <beyond> the super six upgrade.

I was able to get the cut manifold brazed, so that was plus, and thanks for the help in the other thread.

I have the manifolds and the holley 2300 mounted.
Connected the fuel line.
Connected the distributor vac hose.
Plugged off the bottom carb vac port for now which i believe is where i connect the charcoal canister, or possibly the pvc.

Tied a wire to the throttle lever, and cranked it over. She ran for a second or two then died.
I adjusted, not in a good way, the idle screws, and cranked again. She ran for a few seconds then stumbled, so i pulled on the wire to keep her going until i saw flames shoot out of the carb . I shut it off, and put out the small fire.

Before i left for the day, i'll go back when i have a fire extinguisher, i turned both idle mixture screws clockwise, to the full in position.

The engine is a stock 225, and this is the first upgrade.

The only thing i could think of is that the top left stud came out with the nut, and antifreeze poured out. I don't think any went into the port because i had a rag there and funneled it into an empty gatorade bottle, and when i stuck my finger in there with a rag it was dry.

Any help on what i should do next would be great.