If that’s the original carb to that engine, it should be calibrated pretty well for it. There’s a nine(?) digit code on it that will tell you if you are unsure. Be sure and get yours rebuilt by someone who knows qjets. DON’T take it in to some parts place for a rebuilt exchange. Those rebuilders just assemble them from whatever bits and pieces that come out of the soak tank. Then everyone wonders why they don’t run right and cusses them. A properly tunes qjet with its triple venturi setup will actually meter fuel more accurately than fuel injection!
One issue you need to know about with this crap ethanol gas is the accelerator pump. The alcohol ruins the usual rubber cup those are made out of. When the pump doesn’t work right you get a lean mixture when you jump on the gas quickly. One of these, or similar, will save you some headaches:
https://quadrajetpower.com/accelerator-pump-assembly-new-ethanol-compatible-2-57/
