I have a set of seats out of a 94 Viper in my 67. The seats came with the car but weren't installed yet. Bought a bunch of aluminum square channel and some universal sliders off the net and managed to get them in. The car was a bench car though, so I had the raised humps at either end of the floor pans that made the install rather annoying. Also made up a custom tilting setup on the passenger seat so you can get in the back seat. The Viper seats don't tilt forward so I just put in some angle aluminum and hitch pins so that you can pull the rear pins and rotate the seat up and forward some, enough to get in and out of the back easier.