Guys i have an xf efi falcon, worked cam and head. My problem is that the intake lifter on no 1 cylinder keeps getting scooped out and pitted on the edges. Why would that be.?Is the problem in the block or the rocker, it just looks like there is too much pressure being applied to that lifter.

possibly a cam problem....

I have had the cam and lifters changed a few times. Using different camshaft,s and lifters.