Zee toys was a U.S. based toy manufacturer based on California. They produced several lines of diecast cars in the 1970's and 1980's under a couple of different brand names. I've only raced 4 different Zee Toys cars (ones that looked to have a metal base and/or were seen as fast in a YouTube channel), under the Windracers and Pacesetters lines. The wheels don't free up very well, even with graphite. Overall, I don't have much confidence that there is much speed here.
The Corvette came in at 2.588 at 37 grams.