Since that truck has a Caterpillar logo front license plate, a Caterpillar logo in place of the Ford logo and is in Caterpillar colors I’m guessing its a custom job for the company. Not an indication of penis size. Or maybe he really likes Caterpillar.
Caterpillar builds engines for that type of vehicle, and I’d guess he has one under the hood. Wanting everyone to know that a maker of giant earth-moving equipment also made the motor in his grocery-getter sounds to me like an excellent indicator of potential penile compensation.
Getting back to the OP pics, it doesn’t look to me like any kind of custom bed, it’s just a crew-cab (4-door), 4x4, dual-wheel pickup truck with a matching cap on the bed. And some extra (IMO silly looking) do-dads…
I think the crew-cab is a custom modification too, I don’t see that as an option on Ford’s page. The F650 looks like this when it leaves the Ford factory.
I think everyone understands that it’s tongue-in-cheek and that there is (probably) not literally a correlation between penis and truck size. It’s basically a modern day variation on the Napoleon complex which is also probably not literally true. It’s mostly just shorthand for a whole slew of macho posturing-- if you say “small penis truck” everyone knows what you’re talking about. I’m personally not particularly bothered by big useless trucks (I drive a full-size pickup myself) but I don’t think the drivers of such trucks are a group of people that need their feelings protected.
Yes I know Caterpillar builds those engines. I have no way to know for sure but it makes me think it may be a custom job for a company. I would guess that truck costs about 100k.