Lowering Coil Spring Rear Question!

[socalkevin68]

Hey guys...i really want to lower my 68 c10...it has coils all around and is very stock...sits too high for me...a few inches higher in rear and lots of room between fender and wheel top..
Anyhow..I want to start by bringing the rear down as it will be easiest...
I'm wondering what size lowering spring (1,2,3 etc...) I should put on rear to kinda bring it so she sits level?
Eventually i want to lower front..but don't really have the money to do 2 in drop spindles and disc brake swap at the moment..and i really dont want lowering springs alone on the front as i've hard its hard to align etc.
any input is much appreciated..thx