As long as your using a PCV valve with a breather cap on the other side of the motor there shouldn't be any positive crankcase pressure to try and push oil up the threads of the intake bolts
Torque the intake down to 30 to 35 lbs and make sure the bolts you use are long enough,(minumum of 1/2 inch of thread or more in the heads
) especially on aluminum heads
Any time I'm using steel bolts in aluminum I use antiseize to insure no galling