Have my 1970 f250 camper special in the shop for exhaust work. Was just going to replace exhaust manifold gaskets and the donuts but somebody

I'm looking for suggestions as i use my truck almost daily now. LMC is back ordered 6 weeks. Ebay has some stuff but I'm concerned it won't fit properly as they say 360 but not compatible with my specific truck.
Was wondering about headers. I know there's been a bunch said about them. Wondering if there's much adapting needed for shortys. Worth the swap? Anybody have some stock exhaust manifolds or just the passenger side?
Thanks
Lloyd