need help with a Holley carb

8psi is too much. Could be the reason for your fire. Knock it down to no more than 6psi for that car. Change plugs,those are probably gas fouled. Give em a good whiff. Smell like gas they're fouled.

I over looked the 8 psi , deifinitely too high , 5.5 is where I run all my 4 barrels at