I have unit/build number 2003 for sale. I intended this for a 2021 Ram 2500 Power Wagon. I believe you could change to something else, but that would need to be confirmed with GFC. Was told it would be built in July when I put the deposit down. Received email today from GFC to begin finalization of options and to make first payment beyond deposit. No options selected yet. I’m told installation slots as early as September are available for it.