I have a Type II Frisco Flyer, a year older than yours, and have been thinking about putting new chainplates on the outside of the hull. You've written some descriptions on your blog page and on this forum about your thinking about that, so I wanted to ask-- did you do it? How difficult? You mentioned "channel" for the chainplates, and there was a picture of you with a grinder; I might have misunderstood, but if there's metalwork in there, your boat, I'm fairly sure, is different than mine. Mine has backing blocks (fiberglass top-hat sections with who knows what inside) with the chainplates on the inner side of the backing blocks, visible to the eye. The top chainplate bolt is a quarter-inch, and the others, I think (haven't taken them out) are lag bolts.
Getting my boat, "Sumatra," ready for a pretty long cruise to Mexico, leaving at about the same time that you plan to put your beautiful Flyer back in the water. The plan is to trailer it from San Diego to San Carlos, in the Sea of Cortez on the Mexico mainland side, sail around the Sea of Cortez for some months, and then to Puerto Vallarta, where the boat, with its trailer and tow vehicle, will go into dry storage. My wife and I will try to rent an apartment near Puerto Vallarta and spend part of each year there.
By the way-- knees on my boat are about two inches thick, and seem to have facing plates of bronze. Cheoy Lee built these boats well.
Please let me know about the chainplate issue, and thanks--
1964 Frisco Flyer "Sumatra"