You will need to make the width of a buggy and the length of a truggy. Yes it has been done...before the SC8-e hit the streets. You can also use the skid/bumpers off the sc8 with a little fabbing. It looks perfect after completion. I have to say a little pricey tho. Thats why I just bought the sc8-e instead. I originally was going to build the SC8ight. If you just set the sc8 body on the Truggy the arms are way too long and it looks silly.
You can actually use a slash size body on a losi buggy pretty easily and fab the bumpers from sc8-e or off the slayer. Then just some SCT wheels/tires and let the eating of slashes for lunch begin!!