I am looking to squeeze a little more travel out of my 2008 XVP which has 100 rear and a 110 Reba on the front. I can convert my Reba to 120 and wondered if I could install a later Spider 2 or Tracer 2 upper link to get a little more rear travel, or could I just install a half inch longer shock? Stock is 6.5". There is about an inch clearance between the downtube and shock pivot mount.