With springs and oil, you will have to change and experiment with pistons too, they all have to be changed for a proper working shock. In that respect, you will probably have to use trial and error being erevo and MT's in general are not really raced, rather not as popular and no one here knows your track. Most M/T's I see outdoor are put in the open class with everything else that did not have enough for it's own class i.e. 2wd buggys, stadium trucks, small 10th M/T's like the pede ETC.. If you have a full M/T class at your track that's great too, I would look up Steve Slayden for a base set up that you will have to tweek to your driving style.

If you get put in a Truggy class same thing about the springs, oil, pistons and base set up. Let me know when your ready for a Truggy if your put in this class, I might still have a couple race roller kits available