Just daydreamin' here: How bout a 2.2/2.5 turbo in a '60-62 or '63-66 (light!) A body? The naturally aspirated version was the standard mill in Dakotas, so there's a RWD 5 speed tranny and mounts that would at least be a start.
I know, it'd be a lot easier to just bolt in small block, but an...