Be cautious of what manifold you use on a 283-2 barrel engine. It was pointed out to me that these have small ports so some manifolds aren't a good match. see Team Chevelle engine forum: http://www.chevelles.com/cgi-bin/forum/ultimatebb.cgi?ubb=get_topic;f=9;t=011698
It's occurred to me that any recent small block parts are really intended for 350's; just a gut feeling, not a conspiracy theory. I was shopping for Edelbrock C3B or C4B manifolds (for nostalgic look and oil fill pipe) but I decided to buy an Edelbrock S.P.2-P instead. I'm going to use either a 390 or a 450 Holley, might try both and see which I like better. At the pace things move at around here, might be next year before I can say which I used. :( Pete Geurds Douglassville, PA