Check the partial VIN on the engine .
Passenger side , front flat face of block , down low , alongside timing cover.
Then start documenting things like block code , head codes , intake code , carb code.
And also the dealer invoice from PHS.
That will list the engine option.
This TA had SD engine option on the Invoice.
Pretty sure the GA did also. Been a while since it was discussed on here.
Rocky's site has the feature articles about them both.
Originally it would have been 3.08 10bolt axle.
Upgrade would be understandable.
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