Rebiuld? Nah, if that's the case I'll just find another engine. I'll probabally find another head and slap it on. If that don't work. Then I guess I'll have to swap engines in it. No need for a rebuild on this one. The truck was just thrown together so I could play at Disney Ok. on the 6,7,8 of May. To me, it isn't worth it to throw money at it to rebuild the engine. I've got another project truck in the garage that a new engine would go in first. Like I said, I just built this one so I could play.