Quick help? Holley symptom

[61 vert]

Appears to be a rebuild. Has sat for 6 months or so but does have fresh gas.No backfires. Idle screws are somewhat responsive and run best at 3/4 turn or so. I just don't ever remember being able to kill a motor by putting my finger over the front bowl vent. Also, it ran out of gas when I was getting ready to move it into the shop, but as it did, it smoothed out and revved up slightly, so I do believe that I have a rich condition. Also runs a little better if I give it a small vacuum leak on say the vacuum advance hose or slightly pull the trans kickdown hose. All rich indicaters at idle. Front bowl level is fine but seems to be putting a lot of fuel in at high idle.For some reason the base idle was turned way up,I adjusted the idle screw down then was able to get it to run with the mixture screws,It may have been up above the idle circuit when I first started it, but I think we are okay now. Took the gas cap off and seemed to be alot of pressure there, but it went from inside at 70 to outside at 95 right before I took the cap off.