New member looking to purchase a 4" lift what spring length?

[kubota]

Ok,

I have an 86 4x4 that I am wanting to order a 4" lift for after reading I decided to go with tuff country 4" however on websites I'm looking at them at I see they ask if you want 52" or 56" springs.

I measure from end to end on my rear springs looks to be more like 52" springs stock is that what these trucks came with or do some have 56" springs?

just want to get all my questions answered so I don't mess up and order the wrong kit.

thanks