I have a 2003 Dodge Dakota i feel that i cracked the header how much will it cost me?

[Gashadokuro]

Okay as I said I have a 2003 Dodge Dakota I am pretty sure that I cracked the header and now coolent is getting into my oil. when i start the truck up it spews white smoke out the tail pipe and while i was draining the oil i noticed the muffler had coolent dripping off it.

I want to get a good header and fix up my truck. i am not sure if it is better for me to do it myself or take it to a shop. If do take it to a shop how much would that cost me?