Go with the 1" over ESPO springs and you'll be happy.
I used them on both my Dusters and they give the perfect stance.
They will settle some after awhile too. Sorry no pics till I get home-out of town.
1970 FE5 Duster 360/904/3.91's SOLD
1973 TB3 SpaceDuster 340/4spd/4.10's SOLD
Moparless for now but when the opportunity is right I'll have another one.