BRP rear shock relocation kit and suspension setup anyone install one?

[JKnight]

I'd install the upper mount, then measure the distance between your upper and lower mounting holes at ride-height. Even if BMR had suggested a shock length, you wouldn't necessarily want to spec your shocks blindly as rear springs and weight of the car can differ greatly. You want a shock length to be such that the shock is roughly 1/3 compressed at ride height (fully assembled), if memory serves.