I had an old 71 Dart /6 with a 904. I milled the head ~.080 and hand ported it and used a 2 bbl 318 on the old aluminum manifold with a 6 into 1 JR header and a single 2 1/4" exhaust with a dynomax turbo. Stock solid cam. It was pretty quick for what it was and got better MPG than the old 1 bbl stocker.

I built it only because it was the only mill in the Mopar family I hadn't tackled at the time ~25 yrs ago.