Okay, just checked. Daniel had put these springs on before I got the chassis from him. The fronts are OME 761, the rears are 764. These are listed as 2" medium duty for the RRC but I seem to recall being told they give a 3" lift on the D90. Not so sure...
1991 RRC 4.2, R380, LT230, TrueTrac, Detroit, sliders, 33s, blahblahblah....
1994 RRC LWB
1994 RRC SWB
1995 RRC LWB 25th Anniversary Edition
1995 D90 project