massive reconfiguration time again.

K
i'm running 12.8: compression, and don't have 200 pound of compression(thin high altutude air) and have to run racing fuel.
do you thing the detonation marks on your plugs are when you don't get the mix right?
also is there more pepper(spark plugs) on the back 4 cyl or the front 4 cyls??

Also if your mechanical advance chart is correct. For the street i would slow down the advance curve.
Remember the best chance to get destination is at max torque. Highes cyl pressure.
still get all the avance in, just a little later.