I am a novice tuner, but I have some holley experience. Jumping one jet size is not enough to feel but six is kind of extreme. I think three steps at a time is good until you get close. Do you know how to read plugs?

You should have new plugs after your jet change. To check the primary jets turn the car off at cruise and coast to a good spot. Pull a plug and check the color. You want it to be cleanish with some brown tan color. Other colors can be from chemicals in the fuel. Fluffy black is rich a/f oily black is rings or valve seals leaking, look with a loupe or small magnifying glass on the ceramic for tiny metal balls- these would mean it's knocking (pinging, detonation etc.) I like to start rich and go down in jet sizes until it just starts to have a little surging while cruising under load, then go up one or two sizes.

Remember, if you floor it the secondaries come into play- that would effect the readings.

good luck