Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
The swap will be somewhat easier with a model produced after around '83 or '84....when the keel was converted from steel to lead/fiberglass.
You might want to check out the tech tips section and click on Minnie. Mike Leyden and I swapped his swing keel for the wing some years ago. The parts of that article that discuss the installation of the wing might be applicable to your conversion.
That having been said, it might be about the same price and a whole lot less work to sell the boat with the fin and buy a wing keeler.
It is assumes the fin will work with the original wing casting. The wing retro offered by Cat will not work as it is designed to replace the swing.
Ditto on the find a wing comment. If you can find a 88 it will have the lower floor(nice) If you find an 89 it will have the lower floor and a better deck/cockpit(even nicer)
The pictures I've seen of the retro-wing showed that a part of the casting fits up into the swing keel trunk, which makes sense. The fin keel stub has no place for that part of the casting to fit. I agree with the benefits of tracking down an '88-89, which was when the C-25 became too good to be sold at 25' prices.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.