I'm using the Blue Thunder manifold, as mentioned above. It's a good basic manifold, nothing wrong with it. The fit and quality is good.
I had to do some significant porting to get it to match my heads and throttle bodies. There's plenty of material there to get them to match pretty much anything you're using on a 289/302. There are no provisions for throttle linkage or vacuum ports.
However, if I were to do this again, I'd get the manifold from Wayne Presley,
www.verycoolparts.com. Provisions for center throttle linkage, and cast in vacuum ports. Definatly a nice piece.