318 Engine stumble

Have some more info. I took more video of mixture screws and how they are affecting everything.

I will say that I ran the timing up to 15° and the engine really liked it. Went to a solid 21 1/2” vacuum.

The mixture screws like to be 1 turn out. I’ll go more into this.

The reason I posted was.
Vacuum advance. I put a better seal on my vacuum gauge and
re-tested the advance canister. It held vacuum just fine.

I took off the brake booster and sealed up all vacuum accessories.
The carb is isolated.

Huge problem is in the advance. I plugged it in and that’s where a whole lot of the stumble is coming from. When I unhooked it. It revved a lot better. 3/4 of the stumble is gone.....

The mechanical weights or the vacuum advance mechanism must be seized up.

The engine sounds more crisp but the stumble is still there some.
I’m closer than I was. Starts at 14-2000 and is really there around 1700.


Power to the coil.......is 9v

Resistance across the ballast resistor is 1.5 ohms.

The ballast resistor for the electronic distributor........
the dual ballast....also 1.5ohms on both

I will post more tomorrow.

One of the idle mix screws has some gas on it. Not much but some. It’s leaking there on the drivers side.

I will take it for a test drive to see where I’m at.
The distributor has to go. I wanted to learn points ignition system
and I think I have enough info on that now.

What would be a good recommendation for a distributor for a replacement. I only want around 300hp max out of this engine so nothing really tricked out.