K10 rear springs q and a

[Blackfyre77]

Ok guys, im at a loss please answer if you can. My 1970 k10, it could have come with 52 or 56 inch rear springs originally, correct? I have 2 frames one a k10 and one a k20 both have 52 inch springs, mine however under my truck has 56 inch springs. Im looking to buy a lift kit and was about to order it when i realized the kit claims to fit k20 trucks, but does not say it fits k10s. I only measured my springs to see though because i read somewhere they could be either size. My question is 56 inch springs DID come on k10s, right? I told skyjacker it was a k10 when asking about the kit and was not corrected.... the kit im looking at is a c260aksd-m - 6in. (Skyjacker) Thanks guys. Im not crazy, right?