First,
What size are the factory wheels on an 01 cobra (the silver ones with the "svt" cap in the center? my reason for asking is I know a lot of guys run 275s on the rear of these cars and I ran across a steal on a set of 285s. i figured since they're only 10mm wider it shouldn't matter that much but I'm no expert. my car currently has 245s on it now and (if i did my math right) that measures 9.64" and the 285 is 11.21" so the difference is only 1.57"
Second,
I am planning on flushing my radiator before the winter fully sets in and was wondering instead of buying the stuff that's already mixed if I could mix it with RO DI (reverse osmosis deionized) water. I have access to that filtration setup at work. just figured it'd be a lot purer than regular old tap water (especially since the water where i live is hard as a rock)
Third,
if all this has been covered I apologize, I couldn't find any of it using the search feature

I'm also not in the market for a different set of wheels right now so thats not an option.