Last time out at Glamis I busted my rear shock from MS shocks. So I just recently put on brand new Elka's...once they were installed I checked out what could have happed to cause my old rear shock to snap and I've noticed that at full extension in the rear the bottom of my spring touches the pivot point on the swing arm. This is what cause the bottom of the shock to release from the shaft  is anyone else having this problem? it's an 87 zilla.