With the design of the spring perches on the tubular K-member and A-arms, we couldn't just muscle the springs in with a couple of pry bars. We dropped in on our local parts store and rented this external spring compressor, which got the job done. This installation can be very dangerous given the tension in the coils when they are compressed, so call in an expert if you haven't done this before. Depending on your K-member, you may be able to use an internal spring compressor for added clearance. This largely depends on the size of the hole in the bottom of the perch.