The worse thing I found wrong with the newer body is that it is pie shaped, it's too wide in the rear. The body is easily fixed because of the opening trunk, except for the roof which is then too wide for the corrected body. The BEST 57 Chevy hardtop would be the Revell 1/25 snap kit body and interior on one of the newer Revell 57 Chevy chassis and engine. That snapper has the BEST 57 Chevy 2 door hardtop body you can buy.
OOPS! I just saw the years you wanted in your original post, I thought you were looking for the newer body. The years you are looking for were face lifted earlier cars so that hatchback kit has the right doors and windshield, it's basically correct between the center of the wheel openings.
It seems that GM and Toyota did some badge engineering, if you can find one of these it may work for you. Otherwise one of the resin guys is doing a pro stock body that might be able to be taken back to stock.
I'd like that too, but I can hear the cries if "another 57 Chevy, @#$%^&* !!!" from the anti 32 Ford, Tri Five Chevy and Camaro bunch. Meanwhile we have no 56 Bel Airs, 57 210's, non Nomad wagons, sedan deliverys, good 55 or 57 Nomads, 56 Convertibles and on and on......
Great news, first announcements that have interested me in a while. Bronco is a must for at least 2, and I'm out of Black Widow parts kits. (Great FI 283 and chassis) The Pro-Street Berretta, how far off from a pro stock car was it?