They are very modular; if you want a particular version they haven't sold (yet), you can always put together two kits. Smart marketing on their part plus everyone gets all the pieces they need for their own personal holy grail truck. I wonder if they might not at some point put out some engine-only kits - have a box with nothing in it but all the different V8 and I6 (and maybe even diesel) engines these trucks used, all the variant air cleaners and transmissions. Add some go-fast stuff like headers, maybe a supercharger or two, like the Revell Parts Pack motors. For myself, I'm looking forward to a real F250 4x4, other 4x4's, bigger tires and duels. And sooner or later a wrecker body and an ambulance.