so i tore down what was left of the first attempt (ikea rack) and decided to build it low into the frame this time instead of being perched high above the rear axle.
this meant more in-depth thought this time as the bed had to clear the fore, aft and above the rear axle parts. also needs a rumble seat built in as my kids would wanna ride shotgun from time to time.... what you see below is what i've managed to come up with so far. i will prolly trim it further. looking into a suitable paint scheme as well.