If I can help, just give me a shout. I am usually over at slantsix.org. I only check in here, about once a week, so I might miss something.
Last year a friend and I built a strickly street engine for his 64 Valiant 4 dr sdn. It is real peppy and getting 26-28 mpg. Detirmine exactly what you want from the car, and build for that.