I would say that the 3.0 or SVT (same size) is appropriate as a starting point with non SVT cams regardless of which intake manifolds you are using. If you are using the SVT cams (or hotter, such as the milder of the available CAT cams), a 65 mm throttle body would be the appropriare starting point. I'll let others chime in about the MAF but I don't think it is any where near being a restriction yet.
