Kevin
The first (1958) 332 and 352 engines were solid lifter with a midyear change to Hydraulics(identified with a orange mark on the valve cover) Later high performance only type engines were solid only without the galleys being drilled. I have made
oil manifold logs in the galley area with a steel line going to each lifter boss so hyd could be used--I think most of the cam failures are in non
oil galley lifter bores, with no
oil getting around the tappet and running down on the cam.
Jerry