I'd say there is, but it's a much higher class of enthusiasts now than there used to be.
For example, my car in HS was a 1964 Chevy Malibu SS. I put a 327 (with a .030 overbore) from a 1962 Corvette mated to a Muncie M20 Tranny with a slightly narrowed Dana rear end. The interior was meh, seats had tears, the dash was somewhat broken up, but the exterior and frame were clean and straight. I had a total of $2500 in the car, which was less than you could buy a new car (even a Yugo) at the time.
Try to build a clean, straight 196ps muscle car with that kind of driveline for less than $40-50k now, not sure it can be done, even if you ignore the interior.
FTR, now, I'd rather have a modded hot hatch, say a VW GTI R type or Mitsubishi Evo 10, with all kinds of engine work than a muscle car. The Speed3 I had would destroy my SS in both a straightine and on a curvy road. The only thing the SS would have on the MSP is the sound. A hefty V8 with an aftermarket cam and built exhaust sounds really, really good.