for what it's worth:
the Taco is with the 6tf box and the D3 is with the small boxes (5.5ft)
Lengths (in)
Taco 221.3
F-150 231.8
GMC 230
RAM 229
Width
Taco 74.6
F-150 79.2
GMC 80
RAM 79.4
Height
Taco 70.1
F-150 75.9
GMC 74
RAM 78.1
how much bigger has the D3 gotten?
well here's a 2000 Ford F-150
Length 225.8
Width 79.5
Height 75.5