Piston clearance / notching w/shaved head

Nothing huge, I have a NOS Direct Connection cam pkg, off the top of my head the part number ends in "69". I looked it up and it was "General High Performance", said to use the 340 valve spring. I know it's a bit more than a torque cam but it should wake it up pretty good all around.

If I can use that cam, I'll go 2-bbl & a clifford intake I have. If not, I'll go stock cam, 1bbl and factory aluminum feather duster intake I have. Headers (or these cool log-type dual manifolds I picked up cheap) either way.

This is going in a 67 Valiant, automatic. Stock driveline.

Thanks for any advice / thoughts...