When I wanted to lower my Tbird back in 2001 the life-long Ford mechanic suggested, no demanded, that I try his suggestion. He told me that since I had the Sport Springs CODE JJJJ, then he'd cut off I think about 3/4 of a turn which lowered the car at least one inch. He said, "you're only out the labor and if it don't work then we'll replace the springs." Many on this site hooped and hollered about cutting springs but I agreed with the mechanic and said let's do it. Well three years later and 30,000 miles later I still haven't replaced the springs--just the shocks. I had the Tbird Sport since it was born and had 40,000 miles when he cut the springs--we did not replace the shocks. I could tell a big difference in handling and cornering. At the last TCCoA event I attended, many who drove it said it had the most refined ride of any Tbird. Anyway, you could try that route and only be out the labor.
Previous owner of: '96 Tbird Sport with AED SC.
Best 1/4 mile 13.7sec @ 101mph
Previous owner of:'04 Red Mercury Marauder 100% stock.
Best 1/4 mile 14.6sec @96mph on Dec. 20th at Hallsville, TX