68 dart with 340 six pack

Go to the link below and check out the billet base plate designed to replace the original one on the rear carb. It will make tuning a whole lot easier. With the original base you will have to pull the carb off the intake to adjust the mixture screws because they are on the front of the base plate and there is no other way to get to them. The Promax billet plate has the mixture screws angled toward the side of the base so they can be adjusted with the carb on the engine and running.

http://promaxcarbs.bizland.com/id1.html