I owned a 1978 CJ7, inline 6 258 but mine had auto transmission with full time 4 wheel drive. It would go about anywhere I wanted to but never seen a 4 wheel dr that would go when the wheels did not touch the ground. The 6 had lots of torque on the low end so idling would get you thru most holes. The folks that owned it previously will determine the service you will get. The transmission may be your weak point. Gears and clutch. You can't buy an decent atv for 4K. Best of luck