[Jack21]

Careful here, this is a Chevy motor, not a Ford. #1 cylinder is on left, not right as it is on Fords, and cylinders are numbered 1,3,5,7 on left, and 2,4,6,8 on the right. Check Chilton manual for firing order on Chevy 350, verify dist rotor is pointing at #1 when on balancer timing mark, then follow the numbers around. You could have a plug wire on the wrong plug. You'll really notice it when the engine is under load.

Might also want to get an ignition that does away with ballast resistor. HiPo engines do not like having only 7 volts going to the coil under power.

Electric choke has two leads. One is a ground, and is typically grounded to the carb body. The other is the hot lead that's connected to the ignition on the +12v side of the ballast resistor (not the coil side). Make sure the choke bimetal spring is insulated per instructions or it will short out choke and ignition. A heating coil inside the choke heats the bimetal spring and makes it open the choke when the ignition is on. These black choke caps burn out and need replacing from time to time.