http://www.slantsix.org/articles/supersix/article.htm
You didn't mention what you are doing about the choke. You could purchase a new replacement for a super six and solve that problem for about $35. If the carb you get came from a six, it will be easy, if it came off an 8, you'll have to do the choke linkage mod shown in the article listed above.
Everything is spelled out pretty clearly, so read it again.
http://www.slantsix.org/articles/manifo ... unting.htm
This is also essential reading.
Don't buy cheap manifold gaskets, they arn't worth it, since you'll eventually have to replace them anyway to stop all the leaks.
