My opinion is that this doesn't belong in a scammer thread or posting. You two may have a disagreement, but that isn't a scam. You need to work this out with Gene not on this thread.
I've been racing with Gene for several years, and several others that have known him for many years and have never heard anything bad about him.
Remember you bought a used vehicle from an individual, not a truck dealership so whatever you two work out is better than most people will do for you in this situation.