[LS short box]

So the pic of the bolts shown wouldn't they be for front to back adjustment?
On my 68 the hinge fender bolts are the ones that affect the level at the back of the hood.
To get the hood to set lower on my 68 at the back loosen the back bolts on either side and slightly loosen the front bolts. Then push the front of the hood up and tighten the bolts. Close the hood slowly because will cause the hood to move back a bit.