New to the Forum- With a Question

[davecon6]

Hello all,

I have been poking around the forum for some time now and just finally registered a few days ago. Certainly lots of great info to be found!

My father and I have a 1928 Roadster that has been in the family since the 50's when my grandfather purchased it. Please see the attached photo. We also have a 1930 Phaeton that will be a whole post in itself and a 1931 Roadster in 1,000,000 pieces to be put together or sold as a project.

I am trying to get the '28 to run reliably after sitting for 3-4 years. It never ran perfect and I was always a little nervous venturing too far from home. Now, I want to spend the time and money making it safe and reliable so that it will actually get driven more like it should. So, here is the problem- the car fires right up, runs fine when going slow (1st and 2nd gear up to maybe 20-25 mph.) After the car gets warm and I pick up speed and attempt to travel in 3rd gear it FEELS like the car is running out of fuel and it eventually quits. After sitting for a minute it will start right back up and run for a bit then quit again. It rarely acts this way when in second gear, somehow it seems related to the increase in speed and maybe the lower RPM of being in a higher gear.

Up to this point I have done the following:
1. Drained old gas and filled with new.
2. New intake and exhaust manifold (including gasket and glands) because there was definitely a crack in the intake manifold.
3. Clean the carb 2x (Tillotson Model X).
4. Confirmed float is set to 1 inch.
5. Checked for steady fuel flow both at carb inlet and fuel bowl drain
6. New spark plugs (gapped to .035).
7. Tried GAV set anywhere between 1/4 and 1 full turn open at both an idle and at speed.
8. Reached out to my local club so I can attend the next meeting and join.

I am not really sure where to go from here. It is really frustrating because the car wants to run, but ends up quitting on me once I start to feel confident!

I truly appreciate any help you guys can offer.

Thanks in advance,
Dave