I know with the big TB's you need a bigger intake then the FCI. I would PM DL and see. I think his price was cheaper then WK but I don't remember what he said. I think the big TB's come with the intake tube to.
You will want the head to be ported for the big TB. IIRC you need it will to be matched to the porting because it is much larger but I'll be honest I don't know alot about these 700's yet I'm still learning.