The motor in the pics looks like a Align, but he said the motor in the video is different than the one in the pics. Cool RC man. Its a little different, and we like that. Whatever it takes to have fun right?
I haven't checked the measurements, but an Associated SC8 body should be about right in the width and wheelbase department for the short course look. And as Simplechamp said, since the chassis is a truggy, Kyosho GT2 bodies (GT and Ofna GTP bodies are shorter) should be about right too. But beating the snot out of a RC and only having to duct tape the body back together is more fun than scuffing up a new body!

So go do some more beating