Ill put in a 3rd on the Rams Horns..mine fit good except I had to make a round cut in the upper side of the C-Channel on the passengers side bought half the diameter of a beer can, I welded a stiffener plate round that cut.
But as far as sealing they work great and there was plenty of room for my relocated steerin linkage to the box.
Tim


1952 Chevy Shortbed

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If It Aint Broke Fix It Till It Is!