vortec heads. headers or ram horns?

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so I got a 1998 vortec 350 to swap into my 72 swb 4x4. I still have the ramhorns and i was going to use them but not sure anymore. Im starting to think that i should at least get vortec manifolds. I haven't looked into headers to much but i'm not sure about them because of reliability issues with gaskets. i guess I could use coper gaskets. This truck is going to get a lot of off-road time. I don't pretend that this truck is a hotrod or a race car its a truck its going to spend a lot of time at low rpm's any help would be a lot of help. thanks fellas.