Lee446...I've never run one myself, but it sure seems like the single 4500 Indy/Vanke manifold would be an awesome street hemi intake. Obviously lacking the upper rpm power for a big inch motor, but very strong low and mid range.

Just remember, like I mentioned in your post, there are 2 versions of Indy single plane/single 4500 manifolds. The Barton manifold is kind of in the middle power-wise b/t the 2 Indy pieces.
I'm partial to Dominators, so if I had a milder street hemi...I'd definitely want to try the Indy/Vanke manifold.
I have a 540" hemi I will assemble one day for my dad's road runner (4 speed and 3.54 geared Dana, 100% street driver). Pretty mild hydraulic roller, unported Edelbrock/MP heads, and a factory street hemi dual quad intake w/ the Vanke mod done to it. If he wasn't dead set on running 2 carbs on a hemi, I'd get one of the dual plane 4500 Indy/Vanke manifolds for it in a heartbeat.