I am not sure what the following means
"My GAMI split is in the order of 0.8 to 1.0."
what is the fuel burn difference between when your first cylinder peaks and your last cylinder. Ideally, you want this to be at or less than .2G and I believe this is the factor to keep in mind whether any of them need to be changed.
N825SM RV7A - IO360M1B - SOLD
N825MS RV14A - IO390 - Flying