Hi, I am by no means an expert on power parts for the 283. I'm interested in this as well, since my truck has a 283 and the Rochester 2G and other stock stuff won't cut it forever...
Anyway, there is a pretty good SBC forum over here:
http://www.clubhotrod.com/f28-1.html Lots of people with knowledge of vintage go-fast parts. There's one guy there who's a real 283 zealot, too.
