This looks like the only box that will clear my garage door, however the interior length has me concerned. I want to put a 6'4" surfboard inside but Inno website says interior length 74.8"... which is ~8" shorter then the exterior length... so I'm a bit skeptical. If one of the owners of this box would be willing to measure it for me I would be incredibly appreciative! Or if anyone has experience putting surfboards inside I'd be interested in knowing what size. Thanks!