273 advise needed

Thanks. Already replaced the oil/filter. Aways run VR1 racing oil in my older cars for the zinc. New plugs, wires, battery, and coil.

What should the carb be? I was getting ready to possibly rebuild it, but sounds like replacing it may be a better option. Not sure how to adjust valves. I tapped the full cylinder today lightly with a hammer to see if the needle jumped but stayed right at 22psi on #3 with 100psi going in. Sounds like most of it escaping at the intake. Freeze plugs are purchased, good idea on seals.

I was told the car was running three years ago but I haven't been able to get it running. Feeding gas from a jug I know I had spark, and know it was getting gas. Distributor was loose when I got it, I just tightened it down. Car could just be way out of timing. It never even sounded like it wanted to start. My goal is to at least get it running, even if rough! lol
What are the numbers on the AFB? Should be 3854s for 1965, 4120s for 1966, or 4295s for 1967. All will work well. Sounds like intake valves are leaking. Find TDC on the compression stroke and make sure the rotor is under the #1 plug wire. Double check your plug wire positions, VR1 oil is good. That is what I have run for 40 years.