Yes these parts would be the best, but finding 46 year old parts such as exhaust system parts in excellent original condition is near impossible. Also the fact that some of the pieces on original exh systems were welded in place. Would be hard to do on a finished car?
The Gardner systems are far beyond anything else on the market. I have installed dozens and never an issue. And, no I don't get paid for saying this. They just make quality parts.
I sold an NOS chambered system a few months ago, that I purchased in the mid 70's from GM, I'm sure I wasn't the only person who bought one and put it up. At the same time I purchased the chambered system for 'someday use', I also bought the standard exhaust system and put it on my car, cutting the exhaust pipe for installation of headers. That system is still very solid and good, but to reinstall my manifolds, I need new exhaust pipes. Can anyone recommend as a source for 'most original' front exhaust pipes?
What is the actual O.D. on the Z28 headpipe? Is it 2" or 2.25"?