340 hesitates

[1fastcuda]

Plugged off brake booster and carb got about 9in vac at 1000rpm. Starts right up no problem. has a holley 750 not a double pumper. You guys say degree the cam if its starting right up would that still be the problem. My vac gauge bounce's around like 7-10 My freinds chevy has 15vac and very steady.I appreciate the help. When i step down on it hesitates then goes.
Is it possible carb is not big enough. Has a LD340 Intake x heads.

[1fastcuda]

I have plenty of gas in the carb shoots right out. This carb has 2 air mixture screws. I've read that alot of carb's have 4 would that be a problem. Looking at different options before i have to tear apart. Thanks

[1fastcuda]

Got it Fixed Had a freind come up and found out the Power Valve in the carb was bad. When we pulled the carb of noticed that the gasket had gas all around it. Base of carb was gas wet to' So we put a 1in spacer on the ld340 and Put it back together Got it running and had know hesitation and vac was 15. Want to thank all you will your help. Glad to know there's sites on the internet for help thanks again.

[6packcuda]

Glad you got it figured out. Now I want to see a burnout.

[burntorange70]

Good to here she is running better for you. I too put a spacer on my 340. Helped out a lot with heat soke.