This comes from SEMA...the h-u-g-e automotive aftermarket industry organization.

Check out the report on "HOT RODS REGISTERED IN YOUR STATE."

Interesting how many "classic" cars are registered in North Carolina and Virginia. I suspect this has partially to do with a bunch of old work trucks and derelect Impalas jacked up on cinder blocks, rather than actual collector cars...but notice the much smaller Texas number.  Hmmm...

Of course, this is not complete data about collector cars...just the available state info on a targeted sample of registered vehicles...and only 26 states counted. Overall, this is a great article because provides some insight into where hot rodding is most popular.