Here is the Revell/Monogram version in 1/24th. It's missing a few things, but this was a box stock build (nothing except what was in the box was used except paint, glue, and decals) to see how everything fit together. I'm working on more detailed versions of specific cars.
I'm doing the full brass tube chassis route for a 1/24th Ferrari 250 GTO. I am many years into it, and I work on it and collect parts every so often. I got a fantastic set of 6.00 and 6.50 x15 wire wheels and Dunlop Racing tyres recently - cost me about $120, but they are accurate right down to the sidewall detail, tread pattern, and spoke count. Someday I might even finish it.
Steve