Carburetor loses prime after 8+ hours

Yea the chlorinated stuff has been off the market for some time now. It doesnt take much to get it going. Once the engine hits one good time it seems to pick it right up. Which leads me to believe that the carb is empty but not the line. No black smoke or wet plugs suggests is not running into the engine while sitting.

All of the fuel hose is new. I replaced the sending unit a few month back and i replaced it with the newer fuel injection hose. Not too long ago i replaced the hose and fuel filter near the carb as well.

The choke is not hooked up and probably wont be. The pulloff bolts up perpendicular to the carb and it seems to need to be parallel. Or maybe the pulloff is made differently for the two barrel carb. I dunno. Its not a daily driver so the cold startup issues really wont bother me. I will look in a wrecking yard when i go, and hopefully there will be a slant six there and i can see how its setup.

On the electric fuel pumps, are they regulated or do you have to regulate seperatly? And are you just going with whatever the parts house has?
Thanks