Fuel starvation or something else?

[Admiral]

Guys,

Slowly but surely I'm working the bugs out of my "new" 1936 sedan. At long last the brakes are adjusted reasonably well, the points are set properly and it got a brand-new cap and rotor. She seems to run really well but now I've got a new intermittent problem and I think it's fuel starvation but I want some Ford Barn Experts® to chime in (that's YOU ).

The issue seems to happen when I'm driving in high gear at, let's say, 30 miles an hour. If I roll on the accelerator to wide-open throttle in order to get moving the car will pull just fine. But once I get around 45 or 50 MPH it stops accelerating and falls totally flat. In fact this afternoon it outright quit on me and I had to coast into a subdivision to stop.

Now in situations like this, which have happened a few times so far since I've been shaking the car down, if I hit the momentary switch for the inline electric fuel pump the engine seems to stop stumbling altogether and continue accelerating. Also, I've checked the inline fuel filter and it's clean as a whistle (very easy to blow through). Is something wrong with my mechanical fuel pump? Does the pushrod need to be made longer or is there some sort of other adjustment? It was professionally rebuild by the guy that did the engine.




Thanks!

- Craig