The dimension of the transmissions are different, so you would probably have to have a drive shaft made to replace the one from transmission to carrier bearing. You shouldn't have to do anything to the rears, but that presumes you have an overdrive 10 speed. If it is a direct drive 10 speed, then you would hardly be able to use the gears above 11 (direct drive) on the 13. The top hole on a 13, and say 1500 rpm, would have you bumping up against well into the 90-100 mph range with 2.64 rears, depending on the tire size. But if the 10 is an overdrive version, it would be just a swap.
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