my guess

the O/P said in his first post that it was on e-85 and then switched back to race gas, E-85 is rough on intake gaskets when intake is not tightened good from the start, my thought is the intake gaskets are leaking and need to be replaced, I know this because I've been running E-85 for 5 years now and have had to change a few intake gaskets.   

this is in the wrong place and I tried to delete it, sorry