jet kit or re-jetting are they the same or am I stupid?

[gearhead13]

The popping when coming off throttle means you need 1 or 2 sizes bigger pilot jets. Start with increasing the main jet til you get a good color after plug chops, then adjust the needle for best mid rpm roll-on power and response.

[brower]

Got the carbs tuned in for now. I will be adjusting accodingly based on the plugs. Thanks everyone for your insight.

[chef1366]

I'm from NE Ohio
With your setup I'd start with 138 DJ mains, the needle on the third notch form the bottom, 47.5 on the pilot jets and 3.5 turns out on the idle mixture screws. Drill the slide as advised by Dynojet.
If your valves and adjusted and the motor is good (compression) this setup will work for you.