I went with the Slash sized wheels on my Jammin so I would have a better selection of tires to choose from. When you convert to the larger wheels it raises the ride height. So you need to adjust the shock position and droop to compensate. One of the issues with this is it reduces the up travel in front because the shocks are so short. One fix is to go with longer shocks and use a shock tower that is taller so the shocks can be mounted higher (upper). Many are using the rear shock tower and shocks in front, but the problem with that is the rear tower uses tierods for the upper suspension and the front uses an a-arm. The a-arm is stiffer so I wanted to keep this feature. So rather than use the rear tower I made an extention for the stock front tower that raised the upper mount and allowed me to use the longer rear shocks and retain the upper a-arms. Now I have plenty of up travel.
My modded extension for the front shock tower
Shocks attached
View behind showing how the body mount is attached.