Antifreeze questions ?

I've got a few questions about what antifreeze I should be using in 2 of my rides. The first is a SB mopar with iron block& heads and an aluminum radiator (what color/type antifreeze should be in it )?
The second is a 2.5 mopar 4cyl with iron block & aluminum head and a aluminum radiator (color type)
Or does it really make a difference ?????