Seabob....
the Grady design for the hull JZ is looking to repair is going to be difficult if not impossible to use these off the shelf systems. These pre-formed structures are based on a box or trapezoid shape to work properly. A tall and thin glass shape without a solid core like wood or Renicell will be weak.
Grady designed that hull around 3/4 ply and glass and the landing areas under the deck and supporting the inner liner are only about an inch wide. Because they also designed in the fishboxes and water tanks, there's no room for anything wider to be put in its place. Maybe you can do it in the aft section, but that would mean 2 halves of the boat would have stringers running on different centerlines and the additional space required for these units will eat into the fuel tank area....making a 125/75 tank combination to maybe 90/45.....Plus the stock Prisma Beams don't come in the correct heights to support the liner or make bulkheads...that means you still need a wood support structure for the liner.
If this were a flats boat or shallower V and JZ was making a brand new deck/liner then you can use these on the hull and laydown your floor and take it from there, no problem....but when trying to match the Grady design and very limited space or landing area to support the liner, in my opinion the additional cost and re-engineering doesn't add up.
The original design with wood, roving and PET resin lasted 25 years....if its re-done with better wood, biax glass and epoxy, the new stringers will outlast the rest of the boat. You really have to see what's underneath the deck of that boat....it's not an easy design change.
