You wrap your lines near the engine? Filet some hose big enough to fit over the steel line and pop it over as far as you can. Should help. Make sure your gas cap is venting, or that you have a two way vent in the tank.
If you do end up getting another carb, my pick is the QuickFuel Slayer with a wideband Got it on amazon for $320, wideband was $160. I'll help you tune that sucker in too! :D
