Hi cenrique - If you go to the bottom of the iboats main page you will see forums dedicated to certain manufacturers. Scroll down to MFG and take a look around.
I have a '68 catalog a member here sent me and it states the 1968 17' Edinboro Special weighed approximately 945 lbs (w/o motor). It had a weight capacity of 1,741 lbs and could handle a 80 horsepower engine. *EdC* is restoring an Edinboro as we speak...he's the man to talk to.