i'll be looking for a new radiator pretty soon (2nd one in 6 years.) and i was thinking about the aluminum one. i understand they keep your engine cooler but will they last a lot longer? from just erosion turning green that kind of stuff. since they keep things cooler what about when it gets really cold in winter? it gets below zero here quite a bit, its not going to freeze up on me would it? and one more thing my engine is just stock 4.0L would it be worth it? any advice would be great.
thanks tom

99 wrangler sport, auto. 2.5 inch lift, 31 MTR's