Posted on LS1tech, but I though I might get better results on here.

Details provided in the links:

What radiator should I go with?
Radiator Question - LS1TECH

What cam is best with .500-.525 lift? Looking at GM hot cam for simple and reliable install...
Bolt-on Review - LS1TECH

 

id get a stock replacment rad.

as for cam this one id look at this kit as it comes with most everything you need.

http://www.summitracing.com/parts/cc...make/chevrolet

if not look at to getting a custom specked one from some one to get the best power you want.

 

Truck? 5.3? Goals? Stock converter? Need way more info.

A popular "low lift" truck cam is the Comp Cams 212/218. You can use LS6 springs with it. Is this sort of what you're looking for?

Comp Cams 212/218 LSx Cam "LOW LIFT"

EDIT: I checked out the LS1tech link and see you have a truck with a 6.0 engine. The cam I recommended is probably too small.