Join Date: Mar 2002
Location: Austin, TX, USA
True about the rebuild, I hadn't considered the age. But what you are experiencing sounds normal. I'd say you aren't far off course so hang with it. You just identified another problem - the mixture screws have little effect. Vacuum advance will help this. It will raise the idle RPM and allow you to drop the primaries with the idle stop so the idle circtuit works again. After vacuum advance you may need to open the secondary throttle blade stop 1/2 to 1 full turn. You have to remove the carb to get to it though. Its on the right rear throttle shaft boss.
My edelbrock performer RPM cam gives me about 10" also so I can imagine just about what you're faced with. 700 CFM is a fairly large carb and it's going to be tweakier than say a 600 or 650 CFM on a 350 engine. But you can make 700 CFM work fine. Go to the root URL of this site and search the tech reference. Series II I believe has a Holley car & feeding article you might enjoy.
68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI