Ok, I dug around in the manuals on the boat and found one for a Maxwell VC 500 Capstan windlass.
The manual states: "Short link chain can be run on the drum when anchor hauling, however in such applications the
bronze drum version is recommended."
It also states: "The MAXWELL 500VC Capstan can operate in either clockwise or counter
clockwise rotation depending on how the electrical connections are made." so I assume it could be reversed with a suitable solenoid.
There is no mention of a clutch in the manual.
I found a 2005 article on the C 320 association on modifying the 500VC to a rope/chain windlass, but I suspect the kit is no longer available:
https://c320.org/article.php/20050312123201892I will give the chain a try on the existing drum and then go from there.