check around the floor pans, bulk head, rear arches and around all the chasis for signs of rot as the bodies rust off these, also make sure there is no play in your steering box or ball joints (makes it ride like shit), if you wanna be really really smart take the engine out scrap the shell and stick the engine in a disco, as the engine on a fourtrack will pull a house down its the body thats shite lol will last ou forever then atb..daks
The body of a fourtrak is way better than the body of a disco. But i agree with you about the engine