I have a Catalina 27 (1975 version) and it has a small compartment at the head of the V birth. I had a bow roller and hawse deck pipe installed into this compartment, with chain holder. The
anchor is a 22 lb
Delta plow. We have deeper anchorage here so I have had to use Brait
line for my
rode, along with 30 feet of chain. I have 300 feet of
line and the chain and it fits; it won't if you use normal
line for your
rode. I completed all of this in my upgrading of my older Catalina about one year ago.
I am guessing your Catalina also has the small compartment in the V birth as well.