front coil springs - stock or what?

[DaveofTona]

Can somebody tell me how many turns should the front coil springs have on a 67 C-10? Also, what is the correct distance between upper and lower control arms measured through the spring? (with the truck seated normally). I´m trying to work out if my springs have sagged or were shortened, since my front end hangs too low, and I can't see any front suspension drop components installed.