Simple question that I've searched but can't find an answer to; do the four studs used for mounting the manifolds on the 3FE head protrude into coolant passageways? I plan on having to replace at least a couple of them along with a bunch of other hardware (put it this way: I don't expect it all to cooperate when removal time comes) when I do some other work in a couple weeks and would like to avoid a messy surprise.