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Are you talking about the aluminum Koyo Racing radiator? If so, those what you listed are the common problems you face with installing that radiator.
Fans: you're going to need to install electric slim fans (which you can find cheap at the sponsor forum on honda-tech). If you do decide to install electric slim fans, you can do what I did and cut off those spots where you normally would bolt the fans to (since you're going to use the radiator core itself to support the fans).
Drain bolt: you're gonna need to shave off some metal off from the sub-frame, or else the bolt hits it. An alternative I figure you can do is when you want to drain your coolant, you can take out the top 2 mounts for the radiator, lift the radiator a little bit up and unscrew the drain bolt till you have it out.
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