1984 Hydrostream Vector

Hydrostream vector 1974 Hydrostream V King Forbest 225Hp Yamaha V6 9 Hrs just bought this hydrostream vector monday i knew it was rotten so i done started taking it down seen that the transom was rotten and i think the core is to and not sure what all this stuff is im looking at but im trying to figure it out the square in the middle i guess is stringer and beside it is a different fiberglass mat which at first i thought was bottom until i seen a hole in From what I have been reading balsa is a great core for a boat

1984 Hydrostream Vector Vector Collection