Yeah, Gary Conley was the man. He had a Ford 302, then he built this 1/4 scale Viper V10. He was building these for Chrysler.
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While still working out the bugs, his shop caught fire and he lost the CAD files, the tooling, and the original prototypes. Really sad story. Gary was a bad mofo. He built the last 609 Stinger and shut her down.
If you want to see his stuff, they have some in a museum.
https://craftsmanshipmuseum.com/artisan/gary-conley/
If you want to see some amazing machined engines and other things, look through the exhibits. I'd love to go see it.