Lots of companies that make great suspension components out there for A Bodies. Even though lowers can't be adjustable per the rulebook, adjustable uppers, a good anti roll bar and shock package will allow you to make changes on the car as needed. This is just a couple of examples of companies that make great products.
http://trzmotorsports.com/wp2/?produ...sion-1968-1972
http://www.wolferacecraft.com/Search...?CategoryID=28