I would add .2 head shim, # 7 plug (RB) & richen the top 1/8 of a turn. Use the first tank of fuel to tune & moniter temps. You will find that it will run cooler on 30% than 16%. Tune for performance & dont try & tune to get the same running temp you are used to on 16%. This is what I would do, other people may do it different with good results also.