Traction Issues

'67 Dart with RMS Street Lynx Drag Racing Setup...need help

Does anyone have any information about coilover settings for a Street Lynx setup with Viking Coilovers? I have a bigblock 67 Dodge Dart with full RMS suspension and having one heck of a time getting consistent 60' times. I tried with drag radials to no avail and have since moved to Hoosier 29/11.5-15 Quick Time Pros. My 60' times are all over the place from 1.48 to 1.59. My car weighs in at 3630 with me in it. It runs 6.60s at 103 in the eighth mile so I am happy with its performance, just not its consistency. I would appreciate any help I can get.