set the milled heads down on the block with your choice of head gaskets & hold the heads in place with several lightly snugged head bolts then set the intake/intake gaskets on & note the actual distance along the slope that is misaligned. SB intake faces ain't exactly 45 degrees to the deck so give your measurements to him & let him do the math & give him back the heads for the intake faces of the heads to be milled. Toss the front/rear cork gaskets & use clear silicone as they can be too thick stock & after milling definitely will be & can cause a front water port leak. If the intake sets too low search for some thicker intake gaskets.