First problem is the choke was removed. That should not be done on the cv's. They don't like it. The idle screw may be adjusted for to high of a idle or a massive air leak somewhere making a lean runaway condition. Did you use new carb base gaskets ? You need to do several things to try and get those carbs to work, and then it's a guessing game to keep them from going lean. Your best bet would be to either get another good set of cv carbs, or convert to cdkII carbs. I believe all you will need is the carbs, and flame arrestor (actually the base), and make sure the rubber tubes are in good shape. The only issue with the cdk carbs is if the accelerator pump diaphragm goes out, there are no replacements available that I know of.
Get rid of the primer bulb. When the carbs are tuned right, it will start instantly.
When the cv's are running right, they are good carbs, just a little lean on the bottom end due to epa.