header wrap? pro's / con's

Thank you guys and I forgot to mention that when I posted that I would appreciate everyone's input good bad or otherwise.
Since I wrap a portion of both and that needs replacing...
Thinking out loud :
Aesthetically the wrap (maybe a colored one?) nicely done would look better than the bare 3 or 4 year old cheapies that were never painted. It should also carry my 70's custom theme I seem to like so much?
I was hoping it would keep underhood temperatures down thus keeping the cab cooler also would help? I do again plan on using that hood and cutting holes in it for the Dual quads air cleaners. I don't plan on hooking up the windshield wipers so there'll be no rain play to worry about "I hope".