My experience with big Ponchos is only Grand Prix cars. I've had 3.. My '69 was a 428/three pedal car - yellow with a black top and interior. Tons of fun! Dad hooked me on GPs with his '63GP. Was a 421/4-gear car. Still love MOPARS, but the Ponchos are sweet, as well. Nice car, good find. Congrats!