There is no help for this type of obsession. Once you get that bug in your head, you can't get it out. I got the bug to built a rat rod type of hot rod with a bump era crew cab as the body. I even photoshoped a workup to be able to visualize my idea better, and that only made my obsession worse.
Open wheel:
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With fenders (30's era Ford fenders):
There are 2 things that keep me from going forward with this so far... One is I have no where to do this build right now (but the purchase of property in the next 2-3 years will cross that off the list), and the other is I just CANNOT take a crew cab that is already rare, and tear it apart to do something like that. This will become a reality though if I have the room, and come across just the cab someday. I wont destroy a truck to build this, but if the cab is already there and the rest of the truck is toast, well...
God help me if my crew ever gets badly wrecked and the cab is still usable..