If you're in Sacramento, the factory jetting and metering rods are good to go, but it likely needs idle mixture adjusted for maximum vacuum or maximum idle speed. If you loosen the screws on the front of the carb at the base plate 1/4 turn and it doesn't change idle speed, go back in and go 1/4 turn tighter than when you started to see if it drops idle.
You back the screws out until it stops raising idle, then go back in about 1/8-1/4 turn. Then drop the idle speed to where you want it to idle in RPM and without an 02 sensor, is the best way to gauge lean best idle.
Once you have set idle, it should be pulling correct vacuum to be on the idle circuit of the carb and you can check throttle response after. Do your idle mixture and speed settings first, before accelerator pump or any other adjustments, because that will be the basis on which the rest of the carb runs off of.
If your idle mixture is off and you start doing other things, it will lower vacuum, which can change metering and it also means that your idle speed screw/ primary throttle plate is not where it would be in ideal setting circumstance, so you end up with unbalanced tuning from there, up.