FWIW, a friend of mine bought a kit from Silver Sport to install into a 1967 Camaro w/327 and PowerGlide. The kit was COMPLETE. Easiest auto-to-manual conversion I've seen. This was the 5-speed transmission and NO tunnel work was required and the shifter was positioned correctly in the Camaro console.
Denis 1967 Impala SS Sport Coupe 396/TH400/12 bolt. Marina Blue (South Gate built) 1967 Impala SS Convertible 327/TH400/12 bolt. Ermine White (St. Louis built)