I do believe I have one of the 9 3-speed gs400 convertibles. Got it from a guy in ny about 15 years ago. Stated he had got it in 72. It's in bad shape, but appeared unmolested when U got it. How many of the 9 are still out there is my question. Found no build sheet or other paper work except for the 72 title which does list it as 3 speed manual.