Common problem when putting an aftermarket cam in a low compression engine with stock manifolds. I run into this kind of stuff all the time when doing Sniper installs. People put big cams in low compression engines and then the Sniper doesn't work very well. Timing is your friend, sometimes I set engines like this up with 25 to 30 degrees of timing. Raising the idle speed is also a good idea. Raise the idle speed as much as you can without causing other issues. Sometimes you need to change the converter in order to raise the idle speed enough to get the cam to work. The AFR at idle will also be important but can be a little tough to set with a carb. If the throttle blades are in the correct spot you can use the idle screws to tweak the AFR. If the throttle blades are too far open then you might need to drill them in order to get them back closed so the idle screws will work. Depending on the carb you might also have the ability to change the IFR and/or the idle air bleeds. Good luck and welcome to hot rod tuning 101.