So I am looking to do some highway pulls and street racing this summer. I am currently running at stock wheelbase, but hopefully will be going 4 to 6 over. I want the bike to be set up for that. I know I am going to have to change the rear shock, but I know nothing about setting up a bike. I've read the post everyone recommends on here, but I'm still lost. I'm not looking to race any circuits or anything, so I'm guessing I could get away with just replacing the spring? I'm at 220lbs, so I think I'm far beyond the limits of the stock spring nevermind extended.