Those are the 3039 and 3040 springs correct?
I am not sure which springs are 3039 and 3040. Below is the chart I made for OME spring reference. I have the heavy or 2850 front and 2863 rear. Unfortunately the front jumps from 220lb straight to 300lb for comp, but the rear is only extra 30lb jump to comp. Depends on how things goes with my dual batter I might switch both from and rear to comp springs.
OME front:
Model--------rate-----lift
OME 2861---170/220-----stock height (.25-.75)
OME 2851---220-----light to medium load (2-2.5 inch)
OME 2850---220-----heavy load (2-2.5 inch)
OME 2850J--220-----heavy load (3.5 inch)
OME 2418---300-----Comp heavy load (3 inch)
OME 2419---300-----Comp heavy load (4 inch)
OME 2420---300-----Comp heavy load (5 inch)
OME rear:
Model--------rate-----lift
OME 2862---170/220-----stock height (.25-.75)
OME 2860---220-----light to medium load (2-2.5 inch)
OME 2863---250-----heavy load (2-2.5 inch)
OME 2864---320-----extra heavy load (2-2.5 inch)
OME 2863J--250-----heavy load (3.5 inch)
OME 2421---280-----Comp heavy load (3 inch)
OME 2422---280-----Comp heavy load (4 inch)
OME 2423---280-----Comp heavy load (5 inch)