Wow, i'm a little late to this thread, but wow. COuldn't agree more. In my country there are few classics. We have only one running 69 Mustang. No other first or second gen mustangs. Took a ride in the cleveland powered monster and it is nightmarish. SAme wiht a fully restored 68 Mustang i got to try in Thailand. Doesn't go very straight or ride very well. Yep, upgrade the bunch of them no matter what. Or just let them sit in the garage.
The green one used to be a basic blue Hotwheels 1:64 model. It was a good casting that needed a bit of sanding to smoothen out the casting marks. And then i went crazy on the detailing. Placed next to a Minichamps 934 for comparison.