Are you sure thats a dana 60? Looks pretty close to a dana 44a which comes stock. The 44a has an aliminum center section which is why they truss the axle (like the one in picture) because they cant weld the tubes to the diff. BUT the 44a has the same ring and pinion as a 60. Making the axles the only week point.
Its just hard to believe someone would put a 60 in the rear and leave the stock 30 in the front when the 44a is good up to like 37s and the 30 is... Not. Also, those lower control arm brackets look like factory stamped steel... Same with the shock mount. My guess is someone bought a long arm kit ad bolted it on... The truss probably comes with some kits because it has a A-arm on the top from the factory.
It is a sweet lookin jeep though! Probably a mall crawler but has some good potential. Out west not man people run mud tires because they dont have mud haha and a/t tire get the job done on the rock. And what do i know? Im looking at the pics on my phone haha