[coolhandcountry]

That looks like going to make the conversion a little harder. For the size of the truck I would go with a xl motor. If you want a L motor I would go 10L for 12 cells. Should keep the heat down but don't think it is going to get the speed you want. Some of the center diffs had removible cups on them. I got one off ebay. It was for a ofna mbx i think.