Hot Rods 59a Flathead with carburetion/fuel issues

I have a 1940 Mercury Eight 4 door sedan with a 59a flathead. My friend and I put new Offenhauser heads and intake manifold for dual carbs on this spring. After hooking everything up, we seem to be having carburetion or fuel issues. The only thing it will do is idle. It is very difficult to get the engine to rev up without it balking and quitting. One concern I have is we only measured ca. 1.5 pounds of fuel pressure. I am thinking we have a fuel delivery problem. Any ideas???

 

You haven't mentioned if you're using an electric or mechanical fuel pump, sounds like the first place to look.
Is there a regulator in line, filters etc? If so are they all clean and without blockages?

 

I'd start bt replacing the dual intake with the original one then get it running right on each carb independently. Once each carb is tuned replace the old manifold with the dual.

Jim

 

It still has a mechanical fuel pump which was recently replaced. We were using a fuel log, so we are going to trying using a tee fitting instead. If it still balks, then we were going to try capping one of carbs and see if we can get to run with just one carb.

Thanks very much for the ideas! I will let you know how things turn out.