Maybe thinner gaskets to let the intake sink down into the lifter valley further
It sounds like the intake needs some surfacing to make it fit properly.
If it was me I would take the intake and valley pan off and then sit the intake on the heads and use a feeler gauge to see how much clearance I had at each corner(all four) at the top and bottom between the intake and heads to see it fits square or not
I like to see a tiny bit (.0002 to .0015) wider at the top of the intake to the heads or dead even, not wider on the bottom surfaces
BTW, screw Ulrta Black sealant Gasket cinch on the fiber gaskets to seal them and maybe a tiny dab of adhesive silicone on the corners of the valley pan and block to head corners between the valley pan and heads and block
Last edit, I hope. If the intake ports are not shiny there is no oil, if they shine there is