Just purchased my first A body (66 cuda)

I just purchased a 66 Barracuda with a 318, The previous owner couldnt get the exhaust manifolds to fit with the large 318... power steering clearance issues. Are there headers out there that will work for me, or do I need to switch out to manual steering?

Also, I have a 360 crate motor lying around, how easy would it be to drop that in?

Thanks!
-Nate