Pouring new transom / deck

[robert644]

Hi, I am planning on pouring a new transom and deck, and I am trying to figure out how thick the deck is.

Using a deck thickness of 1/2 plywood, The computer at Seacast's website gave me a number of 44 gallons to pour a new deck. This can't be right, when the transom is only 10 gallons.

Also, does anyone have the dimensions for the saddle tanks on a '74 ? Some overzealous person recycled mine while I was absent.

Thanks !