Ok I have a chance to buy a rk tek head for my 03 700. its labeled 15.5:1 and the chambers are roughly 32 ccs. comparing that to slps specs for their domes the slp domes for pump gas at 10k are 34ccs so they are a little bigger. how much race gas would I need to run to run the 15:1 head with premium pump gas? a couple gallons to a tank? 50/50?
