Muzzy,
Can we assume this is for the DD L6 AMC project from your other thread? I get the penny saving and thinking mode, that's where you start.
What's the goal here? You said fiberglass so that narrows things down, but the best hull is going to be drastically different between a Cedar Key Redfishing machine vs. a midnight frogger. :fishing
How many riders?
What is your expectation for running dry?