I am changing out my 63s in the rear and going coil. I have searched marlins site as well as mud and have had a very difficult time getting any info other than coil-overs. I am planning on keeping the front leaf setup for now because it seems to flex very well. My rear setup needs some work and I don't want to keep trying different leafs. I am looking for 5-6 inches of lift to match the front.
