Mutilator is a OFNA 9.5 series based truggy (9.5V, Picco buggy,Ravager ), I have most of them they are very durable, gear ratio is different on the Mutilatoe and Blazer SST for the larger tires, if your running buggy sized tires youll probably need to run a larger clutch bell, I have a Mutilator, ran it as my first truggy, you could pick up a 9.5/ravager/picco chassis, center diff and center drive shafts off of E-bay if you want to shorten it, or I could send you picks of what I have because I need to get rid of all my 9.5 stuff, I've been running a Jammin truggy for over a year and all the other stuff is just sitting, PM me if interested or if you want any info.
John