idk the answer to if the rad will fit or not. i just wanted to say congrats on figuring out the fuel rail issue. its time consuming/frustrating but enough research usually solves your questions.
as far as controlling the efan, the way i try and do things is, the less parts you have, the less chance for failure. for example, the more fittings/adapters you have on fluid lines, the more chance you have for a leak, so less is better for things like that. same for electical. so i would suggest using the pcm. its already setup for that function, might as well utilize it. that would eliminate having to add another sensor and controll module. just get a relay that is hooked up for easy replacement cuz it will eventually go bad. but either way, do what is best for your situation.
keep updating with your decisions tho! we all like to see the different ways of doing things!
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