how many coils do you cut for 1 inch drop on a c20

[dragn91]

So I just got done lowering the rear of my truck with shackles and hangers it got me 4 inches but didn't look quite low enough so I took out the 1 inch think overload spring since I'll be adding rear airbags as helper springs anyway. I installed drop spindels in the front before I did this and it sat pretty level so I want to go down another inch to inch 1/4 in the front. How many coils sould I cut off? I was thinking a half a loop but that may not be enough. Please let me know what you did I have to get this truck to the alignment shop asap so I don't want to be taking out and reinstalling coils 10 times tomorrow. Thanks