Except for if you did a full back panel. If you closed off the back completely then you would want to plywood the top to keep the air from building up in the box and ripping the rear panel off.
Trucks and Trailers
'95 F-250 4X4, long bed, extended cab
^7.3 all the way
14', 16' Mowing
Exmark 36" metro, 14hp belt drive, walk behind
Scag 36" 16hp advantage deck, belt drive, walk behind
Lawnboy 21" 9hp commercial walk behinds x3
All Stihl Handhelds
All Husquvarna saws: Everything from 14" Climbing to 48" 3/4 Wrap.
Thanks to Petzl, Buckingham, and Yale I am still alive!
And I'm 18...