Watch out for those divots Ken and Mark!!
On my C25, 1977, the divots are clearly there but they are in the wrong location. I have both pulpits and stancions and not all of the bases line up with the divots. The stancions have to line up with the cutouts on the inside of the boat, not necessarily the divots. I'm sure Catalina corrected this in later molds but I would move cautiously on a older hull number as such. I would suggest looking at this from the inside. If you just drill the holes where the divots are, you may end up with lots of holes where you don't want them. I can send you some photos if you need. Also, make sure to route out the core and fill the newly drilled holes with epoxy to seal up the core. I can also explain how I did this if needed. Good Luck Mark,Dan