Thanks...glad ya like 'em...no patent protection, public knowledge...there's a 40 gal gas tank in each box...boxes made of treated lumber(lightened where possible), then upholstered w/HD white vinyl...no blueprints...got measurements of tanks, then made boxes to hold 'em...
My '74 came w/20 gal saddle tanks under gunwales...didn't think that was enough fuel capacity, so pulled saddles and installed these...if your boat has in-floor belly-tank, this would be a good way for you to add storage...good luck w/it...post pics if you do it... ...Lowe's has stainless steele staples if you go the upholstery route...