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If it's surging it's still lean..!!one step isn't enough...

My personal opinion is that you don't have enough ign...I know FBO is a great company and has good stuff but for what I was thinking for a curve it's always going to be fat... a 750 with annular boosters will work but I'd do something with those wires...any 50 ohm set will bring down the...

I know exactly what carb you should have...there are two and I happen to have customers that have either one and I'm sure I could borrow both carbs for a week or so.;) You could test drive them...plus I have the carb that's going on Vic's car that you could try also... But first how much ign do...

Back when we were kids we use to put stock 440 carbs on stock 340's and you could feel the improvement just by the seat of your pants... A 600 cfm Holley is a POOR choice for a stock 340 let alone a 340 with a cam and all your hardware. IMHO

Barry Grant HR 220 pump...that is if you don't mind plumbing a return line...it's the quietest electric pump I've found for high hp street cars... I run one on my GTX

There not really junk...they can get the job done,but for all the work that you put in to get them right the return is lacking...a set on kill Edelbrock 800 thunder carb is 20 ft lbs and 20 hp down from a std 750 Holley with duel idle and as much as 55 hp down from a set on kill 750 Nuytten or...

It's pulling fuel because the idle circuit is WAY lean...that elec choak carb is just too lean out of the box for a 340...I fix this problem a couple of times a month all summer long... I wouldn't put an Edelbrock carb in a wheelbarrow... the engines I build have camshafts with a min of 250@50...

Change the shooter first...try a 37 and go from there