I actually bought a new GT-37 back in 1971. It also was a copper color with a a white vinyl interior, rubber floor mats, no radio, 3sp with Hurst floor shifter, 350 w/2bbl carb. That car was a lot of fun but not all that fast… I had traded in a 1966 GTO and the GT-37’s straight line performance suffered in comparison. That said, it was still very cool because even back then there were very few GT-37s anywhere to be seen. Don’t have exact production numbers but I believe Hemmings pegs them at roughly 1500 for the ’70 model and around 5000 for the ’71. One last thing… I really loved that car and would give anything to have my GT-37 today.