Hi Chris, I had one of the early Worlds and fitted it out from a bare hull. Rowlocks went in the gunwhale which to me was the obvious place. A friend machined the fittings up for me. There’s a sketch below. They were epoxied in place with a re-inforcing piece of timber underneath.
A piece of stainless tube might be sufficient – as a simpler alternative.
The standard position was in the side decks – not sure if there is a reinforced area for them. To me that did not seem a very good position.