My Jallii Skiff is 16'. Its a little narrower, and hasn't been on the water yet. I took the width and length from the regular, widebody, and Jumbo, plotted a curve, and ended up with a hull thats pretty close to the aluminum skiffs (lund, Lowe, etc) but with 8° deadrise at Transom. I stole the interior and console designs from the CLC peeler. If you want an awesome 16' skiff that is coast guard approved, I would point you towards the peeler. I also have an 16 work skiff I designed, using some of the Tolman tricks. I know that one runs awesome. I can send you my measurements.
I think the more important question is 'why shorter'? I wouldn't change anything from Renn's book. My experience with my widebody was that because the bow is so pointy and stitch and glue is so light compared to poly/glass, Tolmans run and can be powered more like shorter boats. In other words, a 20 ft tolman widebody gets the same engine as a 16 or 18 ft glass deep vee boat; 60-90hp. If your marina/slip has a length restriction, you might try to argue about weight. Most any marina should want as many beautiful Tolmans as they can get!
Are you a Hawaiian waterman! Aloha bruddah.