I guess it could be valve springs or fuel delivery, if it's not just plain out of breath.
I have 1/2" fuel from the sock to the Holley regulator (at the front), and a Holley blue pump. 3/8" from the regulator to the carb. I also have a mech. fuel pressure gauge, never thought to look at it. :rolleyes:
Valve spring pressure is one thing I didn't check when I had it apart.
