I have an Offenhauser 2 x 1bbl intake I picked up along the way. Also have a cast Offenhauser valve cover and a header. Was to be used on a project I sold some time ago but may be neat on the Challenger. That would provide some interesting eye wash (and some ribbing from some). Would possibly swap out the original 3 speed manual for a 4 speed OD and thereby allow a steep rear gear. Probably quick enough for this geezer and it would definitely be "different". Also have all parts on the shelf as opposed to shelling out more cash.