I looked in my book to see what it has and came up with:
front D44, open knuckles, rear axle: it is not clear what it has in the book. Can you look at it? On the top of the rear axle housing it will be cast in "60-2" in large characters if it is a 60. Does it have 5 on 5.5" lug pattern? If the rear axle is full floating (big stickout metal hub with bolts, and 8 lugs) it is a FF'60'. You can also check the ratios with a small metal tag attached with one of the cover bolts.
Some of the lower GVW J20's actually had D44 rears. Make sure. The ratios were not that great either. The stock ratio, because of the ever tightening CAFE standards, was 3.73 with the option of 4.09.
You say it has a Ford 360. Ford didn't make a 360. AMC used a 360 in this year and all the way up to '91. Chrysler also had a 360 at this time, but it's an entirely different engine. All had carbs, not fuel injection.
There are 3 possibilities if it's a 4 speed truck transmission: a wide ratio T18 or a close ratio T18. Actually around this time the T176 was available on the lighter duty applications, so check that possibility out. Let's hope it has a D20 not quadratrac. If it has Q-trac, don't even buy the truck. The rear axle will be offset to the pass side w/ Q-trac.
I would say if it has the wide ratio T18/D20 and a AMC 360 in good condition, you could swap that whole thing into your CJ8, as some on this board have (or have threatened to). If it's the close ratio, D44's, not D60, or has Q-trac, it's not worth it.
I assume you read my J-4000 rambling post. It had all the right stuff for striping.
regards, as always, jefe