OT Skidder question

How did the trip go last weekend? Hope all was well. Drop by anytime you're down.

Now to the TJ. I'm guessing this was an older machine? Probably had an old 353 Detroit or possibly an old Perkins engine previously? More likely the Perkins. Is there a chance that he dropped a way more Deere engine in there than what cam out in terms of power and torque? The first thing that's really coming to mind with me is that he's got too much engine for the clutch he's got. The second thing that comes to mind is that it's getting abused.... but that's harder to do with a skidder. Shock loading, that kind of thing could shear the rivits. Although I don't see what kind of real shock loading it would get unless it's pushing over trees, or climbing over stumps at high speeds, and making use of a pile more power than it had before.
He could also look over the clutch disc and see if there's some numbers on it. He might find some, and then head off to parts for trucks. I know the local contractor that does our hauling gets a lot of the parts for his TJ's from them, rather than Lounsbury. Just a thought.... I dunno too much else why it would shear the rivits, unless like Rusty suggested, there might be an alignment issue. Hope it works out.

Rod