There are few companies that make GS replica bodies but only one which allows you to use stock style frame and bird cage. The local rules and regulations over this side of the pond say that I can't use an aftermarket tubular frame on a street car, so I was stuck using my stock frame and working with it.
So my body came from MAI = Mid America Industries and their body attaches to the stock bird cage just like stock. I've seen few GS replicas build by some other companies and they don't have any inner body support structure and I can tell you some of them have been pretty flimsy just standing still, I can't believe how they will shake rattle and roll at high speed...
Getting the body from MAI was a 2-year battle, because GM was trying to shut down all the GS replica makers at the time. Luckily I finally got mine. Here' are early mock up shots.
Even though these body panels are press molded and should fit a stock C2 bird cage relatively easy, it was a far cry, none of the panels fit right of way. Every single panel and piece needed work, some more than others. But just seeing that thing shape up gave me a new boost of hope.
Thanks for looking.