Well after countless hours of adjustments and replacing components, I finally gave up on the Holley and replaced it with a remanf'rd Edelbrock 1405 manual choke. Money is an issue. Recently replaced ignition components and set timing per Lar's to eliminate this as issue with Holley. Haven't had chance to replace distributor springs/ weights. Car pulled 17 in vacuum at idle in gear and 45-50 mph cruise on level highway with Holley. Car is stock L48 350, no emmisions, Dynomax headers, 2.25 in exhausts w/ Flowmaster 40's, std resistor plugs, 2 yr old stock fuel pump, no overheat issues.

Everything seems pretty good cept there's a slight hesitation when cornering esp left turns.The jets and metering rods are base, the spring I bumped to a 7 in Hg(pink). Idle speed at 850 rpm in park and will increase some on hotter days. The float is skewed but dead on 7/16 in at center. The idle mix screws were set at 5 turns out from box. If I set them by ear and feel(tach/dwellmeter gage not sensitive enough to 20 rpm change) I wind up with 2-2.25 turns out? Backed off to 3 turns out. I wanted to get forum input before I called Edelbrock. I appreciate your help so thanks in advance...

 

The stock Edelbrock carb is jetted on the lean side. Bump the jet size up 2 sizes and I think you'll see better throttle response and elimination of the hesitation.

 

Let's go back a step or two. You should be able to idle at 750 rpm in park, and a drop to 700-650 rpm in gear with brakes on.

You need a vacuum gauge, about $20 at most auto parts stores.

But first take the carb back off and-
1-take the top horn off and clean the needles and seats.
2-take another look at the floats and bend the tabs so you have 7/16 at the end. 1/2" is also ok, but make sure they are both the same.
3-Use carb cleaner spray and shoot all the passage ways you can, and then follow up with comprtessed air. Those little caves need to be clean.
4-Look at the butterflies. If they expose more than 040" transistion slot, adjust the butterfly with the idle adjust screw to get the slot exposure close to 020".
5-Install the carb.
6-the idle screws should be at 1 1/2 turns out or very near that.
7-plug in the vacuum gauge on manifold vacuum.
8-Start that guy up and let it run through at least one cooling cycle.
9-Now with the vacuum gauge adjust the idle screws carefully to highest vacuum reading. (When I do this I also have the timing light hooked up)
10- adjust between the ignition timing and the idle rpm screw to attain your best level. I think this should be around 750 rpm, 20-21 inches vacuum, and 10-14 degrees initial timing.

Next to consider-
There are three settings for the accelerater pump. Most cars like the middle setting.

Your stock fuel pump can deliever up to 9 lbs pressure. Edelbrocks flood past the needles at 6 or more pounds. You might want a regulator.