Hi DCparg, did you get your RA figured out? I will add that I am going to do this, so yes is my answer to your question. Some kits are more complete than others and I am sure you know by now that you have to cut the hood. The hood scoop inserts are different length to mate up to the 'flapper' that opens the air flow. A real complete kit will have the heat riser that attaches to the driver's side head and sits on the exhaust manifold.
The answer to your question about the manifold is 'it depends'. I think it would look more proper to have the HO/RA style manifolds - called 'factory headers'. However, it is not necessary other than to complete the heat riser.
Like I said, you probably got your answer, but I wanted to reply with my thoughts.
Torque (tork), n: 1. The tendency of a force to rotate the body to which it is applied. 2. See also: GTO