Flutter below 2k rpm

I missed alcohol too
but it wouldn't significantly change anything I said, in regards to mechanical things.

I have not tuned anything beyond E10,
but one thing I know is that alcohol likes Scr, lots and lots of it; 9.7 will not be enough for a 274 cam, especially not a 274 with those long slow ramps.
Also all the timing and carb stuff I spouted is in regards to regular pump-gas, and including E10.