upgrades

What is everyones thoughts on upgrading their rigs to full aluminum or insulated lines? My truck is 25 years old and as far as I know the radiator is OEM. I'm worried that the high rpms that come from wheeling will degrade my engine without proper cooling...Thoughts?

Seeking the wisdom of the OB hive, I'm getting the suspension upgraded on my 2006 4runner soon, along with new tires, removing Xreas, installing sliders, and installing the drawer system that my father and I built. With all of these changes what to I need to look for to make sure that...