My brother-in-law has a 1972 23" Imp cuddy that is very impressive. It rides and handles rough seas well. It seems to have a strong hull and top end. His only problems have been with the wiring but we don't know if the problem wiring was factory or after. we think it was the original owner wiring taht gave us problems and then it wasn't major.
One of the launch ramp experts told him not to buy it because the Imps were rough riding. We have not found that to be true, it rides nice.
His only gripe is all the glass is not glass but plastic and hard to keep from scrating and to keep clean.
"Snow Goose", John Jensen
www.johnfjensen.com