New to the board - Headers question

[rhdowns]

This is my first post although I have been lurking on here for quite a while just admiring the pictures of different rides here, tips and tricks and just the conversation in general.

I have my Papaw's 1986 Chevy K10 that has 90k original miles on it. It was his baby and we have tried to keep it in the family since he passed. It has the original V-8 305 which is really terrible and has trouble keeping up speed on the highway with all the weight of the 4x4 (weighed it at a truck stop the other night 4480lb).

So in order to start bringing this truck back to life I have ordered a crate motor which my dad picked up last week. We are planning on putting it in this weekend and I need to get some headers for it. So I have a couple questions:

What headers do you recommend? I do not want them to get rusty so ceramic was what I was thinking. My truck has the factory air conditioning which seems to mount to the manifold - any tips or tricks when replacing with headers?

The engine is a 383ci with about 435hp\440ft\lb torque and the carb is a 750cfm not sure if all that is needed to determine what size headers\type headers to get. The truck is not raised or lowered - stock suspension minus some new shocks I put on a couple weeks ago.

Any help would be greatly appreciated!