I think a lot of your issue with the milky oil is not running an evac system and is more like the result of condensation rather than alcohol. We run a 377 SBC on an rear engine dragster, 820 cfm Rupperts Carb with 166 jets square. we leave the line at 160 and are back at the trailer at about 170 to 175. We only use the water pump and fan to keep temp below 160 in the lanes before staging. We run an electric evac system that is really cost effective (about $220) and it keeps the majority of the milk out of the oil. To help keep condensation from building during a race and between week ends, we run the car at an idle when we get back to the trailer and bring the temp up to about 180 or 185. During the week when the car is stored in the trailer, we leave the breathers out of the valve covers.