One of the hardest parts is going to be motor mounts. I don't think they will line up. Although the 22RE gives you two different positions. Apparently V-6 trucks have different mounts.

The wiring is not usually that different between 4 cylinder and V-6 trucks, but you're talking different years too, so it's hard to say.

I wonder if you could part out the bad truck and generate enough income to rebuilt the motor in the good truck?

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