Lou head room in the main cabin is a little over 6ft about 6'2", then reduces to about 5'8" in head and V berth (I am 6'4" tall and get around OK). As for the aluminum beam, as far ai I know those were all aftermarket repairs. I have Jocelyn a 1975 boat for sale in Staten Island NY. Contact me off the board for details and photos. Mark 1122066611.0