[Krusekontrol]

we have 2 shocks on the buggy. The larger is pre loaded. I forget what video part that was shown in.

as for moving the axle back you will only gain a few inchs and you will need to close up the rear and stregthen the base anyway. Plus your going to need a rear bumper or guard since your sprocket will now be exposed to impact. (Bumper - good idea no matter which way you build it)

You can do it both ways but you will need to add metal in several areas and keeping the housing plates in place just makes it easier to cut and measure.

NOTE: The center bar in many of these swing arms is not true center so make sure you check them out before you start cutting. If you leave the center bar and move the plates back make sure you beef up the center bar to handle the impact of the bigger motor. Remember the center bar was installed to hold the swing arm square no for engine support. So check the welds good.