Ryan,
The rockshafts are different from the 1450 to a "782" (that's what your 682 would then be). I also don't know if the long hyd cylinder that the 1450 used would work either. But, if you are serious...... I may know where a valve, cylinder, rockshaft, are for a 782. BUT, no rear end....
NO, none of it would fit the 129. Not easily anyway.
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