Yes, heresy according to Elon, and I expect some heat for this, but: This engine, packaged in one module, a fuel tank in another module, each movable by one person, would be the ultimate range extender for any EV truck. Or even a frunk version. https://innengine.com/
~#2500 for me - no email yet - but remember - most likely will be a blend of region and reservation # - my guess - TX then CA then ??? - and a couple years ago, I thought Tesla said all reservations were generic and no longer included a trim level, because trim levels were changing