It's just an early '73. And not even that early. Production for the next model year started in August, so there was a couple months of '73 production before that one. Nothing all that odd about it.
My '72 Challenger was built 8/71. It did have some leftover '71 stuff, like the late '71 fuel tank and '71 dated gauges. But it was a standard dash so they look the same as the '72's.
Nice looking Challenger, btw. Lots more solid than mine turned out to be!
Yeah that cluster has been swapped in at some point, that wouldn't be original for a '73. Not even an "early" one.
