Intake and carb choice

Jets don't do anything for idle. You have a fairly large camshaft which is going to complicate things a little.

Is it rich on cruise? How have you indentified which circuit to adjust?

How do you know it's rich? Have an A/F meter?

If it's at idle and low speed cruise, lower the float level 1/8 of a turn on all float bowl adjusters. See if it helps.

Cruise at low speed is idle feed restrictors that do the metering.