Stock spring dimensions?

I've looked here in the stock tech forum and in the FAQs but I can not find dimensions for the front or rear springs on XJs. Does anyone know the eye to eye length and width on rear springs? The front eye to center pin length and center pin to rear eye length? How about the material thickness, coil diameter, free length and rate on front springs? I've got a J-20 I'm thinking of swaping my drivetrain from and wanted to know how much will cross etc. I know that swaping those parts would be considered "modified tech" but the information about the stock locations and ratings would be usefull to all.

here you go... http://www.generalspringkc.com/index.php?p=catalog&parent=142&pg=1