Funny story, one time a guy I work with asked for some help putting a lift on his mid 80’s K10 in his
garage.He ordered a 4” kit. We put the lift on one Friday evening only realize after we had it together that it was sitting way higher than we anticipated. Checked the part numbers on the springs, sure enough, Sky jacker sent him 6” springs. All he had for it were a set of 35’s as he as replacing an existing worn out 4” block lift that the truck already had. We had to let all the air out of his tires at 2am on Saturday morning to get it out of the garage