I ran a non-pressurized coolant system in my 1985 Ford Ranger for three years, because I could not get it to stop leaking - I just drove around with the radiator cap loose.

I don't see why that would not work with an SRT, but I dont know the first thing about the "separation kits".

Woody has not checked in for five weeks, he will eventually see your question - you might send him a PM, that generates an email alert to him....