The 210 body was different from the belair. The roof line changed due to the addition of the rear side window post. If you compare photos of the two you will see that the 210 rear side window area is longer than the Belair.
Also the Belair model usually has the molding lines for the aluminum ribbed panels on the rear quarters. The 210 doesn't have these. As for pics and info, that car was built by Popular Hot Rodding magazine back in the 60's and is the longest running project car to date.
Unfortunately ther isn't a lot of info on the build circa Hollywood Knights era. The car was recently re-done by General Motors and is a far cry from what it used to be.
I can tell you that for the film the car had a small block chevy with dyers 6-71 supercharger, Cragar s/s wheels, no hood, a 4 speed and 9" rear with ladder bars and leaf springs. The interior was done by Tony Nancy in black and brown vinyl. The dash was painted the color of the car.
Hope this helps.
Matt