Sorry about the hijack here, but you've certainly gotten my attention with that statement. Please point to the paragraph in the ITCS that allows removal of butterflies because they don't fit after you've performed an optional port matching mod.[/b]
Gary, you're absolutely correct, there's nothing in the ITCS that specifically allows the removal of the butterflies. What the ITCS does explicitly permit is "manifold and cylinder head port matching". What it does not say is "manifold and cylinder head port matching is permitted unless it requires the removal of the butterflies to do so". To quote the second-most uttered mantra of IT (right after IIDSYCYC), "If it says you can, then you bloody well can".

Now, I have one favor to ask of everyone; if we decide to turn this into a 20-page debate about the legality of removing butterflies, could we please start a new thread? Pretty please? I was really just trying to figure out what's wrong with my car here.