Took out the 1211 and but the stock coils back in tonight. Took 45 minutes. The truck is nicer on the highway with the stock coils but the 1211 were never 1 ton rough. With the axle fully lowered, before removing the lower shock bolt, the 1211 could float around with about 1/4" movement. Needed to pry the stock coils in with a small bar.
As I recall, the 1211 are 1mm thicker than the stock coils. 16 3/4" vs 18 1/4" long. Approximately 7 1/4" fender to tire gap with either spring unloaded.