I'm assuming you measured clearance at the worst point...as the lifter rides up on the cam lobe, the clearance will be different than it was on the base of the cam.
I've turned the motor over so much checking clearance, I've probably broken the rings in.
Worst case is intake side up top, and cylinder side on the bottom, with the b3 kit pushing everything towards the intake, I had to take a bunch of towards the rail.
