Re: Terry/Delhi model
You're not doing anything wrong ... they don't have details outside that range. Boat manufacturing in the 60's and 70's was a (near) melee. Bundles of small manufacturers jumped in with both feet and all sorts of boats hit the market. 30 or 40 years later, there's limited data on a lot of these companies or their boats.
If you're wanting an owner's manual, it'll be hard to find and won't contain anything of significant value to your boat. If you're wanting construction details, the 14' Super in the chart is probably pretty close - 313#s, floatation foam, etc.
Fiberglassics.com (the link I sent you to) is a good resource to see what information is collected about a given boat manufacturer, but it's a forum-esque group similar to iBoats and has limited information.
So, what ya' see is probably what ya' get.
HOWEVER, if there are questions you have about the boat we might be able to answer them here on the forum. There are a few owners over in
THIS section who have some threads (don't know how recent they are).