It's not a big deal, but you will have to be damn careful. My first question I have is was it all trial fit to perfection before it was painted?
I will often see a project like that be handed to a body shop who doesn't know what they are doing and they paint all the parts off the car before they are even trail fit,
BIG mistake!
Were these parts all bolted on and hopefully marked so you can bolt them back on without wrestling with them much? I don't care how they were marked, they often will still take a little "massaging" to get them as best as they can be. But if no marks were made that adds a lot to the task of reassembly.
If they were assembled on the truck EXACLY as they are going to be now, I am talking with the frame you have, with the rad support and how it mounts to the frame and all that, if it wasn't FULLY assembled prior to paint, you could very well have BIG problems.
Brian