67-69 Dart...275/60/15 drag radials...how low is your stance?

If you put them on a 7" rim it's easier. An 8 or 8.5 rim makes section width wider.

http://www.forabodiesonly.com/mopar/showthread.php?p=1559522#post1559522

Check Zhandfull's car out. Springs in frame. It's tight. Trimming the fender lip will help.