Coffee is what he does- has been a roaster for a long time, and he sells at the store, other stores, and farmers markets. He has a pedal cart that he can sell out of, and a trailer that he'll start with on this. There are other food vendors that sell out of trucks around here, too.
I'm not really forced to be a blue oval engine, but you can understand that I'm a little biased. Diesel isn't really part of the equation, even though he asked- it's more about budget vs. emissions, which I do take into account, since I know he won't want to live out of the truck much if he stinks and has headaches. Which is why I'm more focused on a modern, fuel injected, powertrain.
As for the actual swap, I have considered a Ranger- for this purpose, they would be perfectly fine, dwight- it's not as if the truck is going to spend hours on the road. BUT- and this is the important part- the easiest swap appears to be an E-series, or a Sprinter type van. Where the driver is more next to the engine than behind it. It would be a lot easier to do a basic frame swap for that to work.
Ironically, engine space isn't much of a concern, in my eyes- the engine cover is flat sheet metal- which is really easy to change.
One other "caveat" which isn't serious- but the wiki pages suggest that the original engine was a V8.... So I'm going to keep a V8 E150 as an option. But the current truck does sound cool with a straight 6.
Cooling- if I go with a modern chassis swap, cooling isn't an issue. The systems are designed to pull a BUNCH of air, since they are to be capable of towing uphill on a hot day in the desert. What I'm far more concerned about is power, on the electrical side of things.
(I don't want to even consider a ecoboost swap... chills up my spine for the work needed)
I'm hoping to take a look under it and take measurements this weekend. The whole chassis swap would be the safest, since it would bring modern brakes along with the powertrain. We'll see.