what to say to nit pickers at car shows

One time I was at a gas station filling up my Petty blue 70 Coronet 440, and this geezer walks up. "" I used to have one of these back in 68' mine had the D-5 Hemi with 383 wedge heads, Does yours have the 500 rpm rev limit in between each gear? I had mine up to 160 mph, How fast is yours ? I must have looked like a deer in headlights, I had absolutely no idea of how to respond to possibly the dumbest statement ever made. I just smiled & said, "yeah, they're alot of fun aren't they." and got in my car.