1973-1987 stock K10 owners

[D-Rat]

Hoping someone could help me out with some measurements. I'm using chevy parts on a non-chevy project and need some measurements on the front suspension:

I need the eye to eye measurement on the front stock leaf springs with the weight of the truck on them.

Also, since these springs are typically inverted some, I need to know if you draw a straight line through the spring eyes, how much higher than that is the bottom of the spring pack where the axle bolts to it. (hope that makes sense)

Thanks in advance!