slant 6 to SB throttle-how to do?

Besides resto parts, which IMO, cost to danm much, Lokar (or equal) cable kits wrok well and are easy to instal, adjustable and customizable. The below link show's a stock carb and home made bracket, this you will not need.
http://www.forabodiesonly.com/mopar/showpost.php?p=91931&postcount=81