That would be Imperial Services. They have a cable set-up to use the original shifter with a later transmission. In addition, a valve body mod needs to be done. They also supply the part. I will be using a later model 904 behind a 340 and use the original shifter in my 65 GT. I had Proformance Transmission (a subsidary of Dynamic Convertors) rebuild and upgrade my 904 and do the mod at the same time. Am no where near ready for that stage so I can't report on how well it works.