Okay, I wont get these for a long time, but I will be getting an alum. radiator, and an electric fan. My question is first: How do I figure out what size of radiator I need, ie how many "cores" etc to cool a BB chevy or pontiac. I would rather have overkill, then not enough... I need to consider the width and height, for when I narrow my fenders, I dont make it to small. secondly, what kind of fan would be good to cool a large engine like that? I will have more questions later, as I dont know anything about radiators... like I said, I will not be getting these soon, I just want to know the ideal size, etc. Thanks!