Thanks Scot, he's getting pretty close to having it running now, hopefully by the end of the month. We ordered a set of Moog 5662 Coil springs from Summit, listed on Moog's website as 748 lb. spring rate. He cut off 1.5 coils which is what the average that most S10 guys were doing. That theoretically will increase rate even more but we just say 700 lb. to keep it simple.
Right now the truck is maybe 1/2-1" higher than what we're after but we need to drive it a bit to let things settle and then we'll asses how we like the ride height again.
BTW these same springs work in a G-Body, I have them in one of our cars with 3/4 coil cut off to yield about 2 1/2" drop.