If it turns out to be "too wide",why not use a 1-1/2 ton doghouse on it? Then it'd be just right. And I suspect you can buy over-wide rear fenders for stepsides,cantcha?
Speed


1954 GMC 350
1957 GMC 1/2 ton
1962 Chevy C-30
1952 Chevy 6400 dump bed project truck
'98 Harley FLSTC
'66 Pontiac Catalina
'76 Chevy 1 ton Duallie
'84 Bronco II
'78 Dodge W-200
'81 Toyota 4X4 truck