Hey, helpful tip to more accurately sell these springs so people know what they are buying. These appear to be stock Chevy leaf springs (minus overloads on the one pair). You gave the free length eye to eye straight across but how leaf springs are actually commonly referenced is arc length where you give the eye to eye length along the arc of the main leaf. I am thinking that what you actually have is a set of 52" and 56" springs which is a very popular setup on fullsize Chevys. The 52s are originally rear springs from 1/2 ton trucks but moving them up front provides gobs of flex and around 4-6" of lift over stock length front springs. The 56s came off of the rear of 3/4 and 1 ton trucks and can be made to do pretty well with a bit of pack tuning. They don't really provide any lift by themselves when replacing 52s in the back but a simple shackle flip and longer shackles will match the amount of lift that the 52s give up front.
Also, last thing, I know you put your phone number up but location helps sell stuff too.