I think on any system, you can go up any amount on the speaker's watts as long as the ohms are the same (speaker for speaker swapping). Not sure tho- just my experience with bass/guitar amps :)
I'm guessing the squirrel knew about all the deleted items and was just trying to "evolve" your Ranger. lol. But seriously, better the engine cover than the wiring harness! Maybe a good distraction?!?