When I used to run a 440 6-bbl (both my Challenger and Road Runner had 'em at one time) I had home-modified outboard plates to allow using "real" jets. Not sure what a Stocker 340 would want compared to a street/strip 440, but I'd say have 62-68 for the center carb and 76-84 for the outboards. Even that will likely leave you w/ some jets that never get wet... but it should cover you across a pretty wide range of conditions if you'll be traveling around to different tracks
Good luck! Me luv Challengers with T/A hoods!