Very cool looking trans. According to this post: http://www.jalopyjournal.com/forum/threads/x-shift-aluminum-trans-case.223047/ you can build one up from original Chevy parts, although with iron case (37 - 47 truck??). There was a late 50's close ratio gear set, I think used behind 348's, that should go in. It could be an interesting trans for any stovebolt powered track roadster. A poor man's in/out box.