Engine stall on hard braking (demon carb)- HELP

[Grubby]

I raised the front float level to the top of the sight glass. Now some fuel comes out under hard braking. The rear float is about 1/4.

I advanced base timing 2 degrees at a time and road tested. It is now at 18 deg with about 38 deg total (all in by 3500 rpm). I am using vac advance from ported vacuum. The car actually runs much better and I didn't hear or feel any detonation. It pulls noticeably harder and idles better. I put it in a high load by trying to accelerate in 3rd gear at 1200 rpm. Do you guys think there could be detonation that is not heard or felt? The side pipes are plenty loud. I am nervous about the timing. This is my first Ford.

I did not build this engine. I bought the car partially done with a running engine. It has Edelbrock Performer RPM intake and heads. The previous owner said it had the matched Edelbrock cam and 9.0 compression. It idles at 900 rpm with 12 inches of vac.

The added timing makes it less likely to stall on hard braking. It requires a longer hard stop to kill it. I attribute this to the better idle quality.

I went through the Demon installation guide and it looks like everything was and is set correctly. I read my spark plugs and they were all the expected tan color.

This is the last issue to work out with this car.

John