Here are some pictures of the engine mocked up. These are Lemon's headers with 2 1/8" primaries. There clear everything fine but it is tight. The steering box and header basically have to go in at the same time. That was a trick

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The headers are nice and tight with great ground clearance. The 3 bolt flanges are about 1/4" or so from the floorpan. I have raised the tailshaft of my trans about 3/4" for driveline angle reasons. That helps get the headers up nice and tight as well.
I have also confirmed they will not clear the TruTurn though without a tube being moved. At least not using a traditional tie-rod on the inside. I'm undecided on this header mod at the moment. If I do this I'm gonna go ahead and switch them to v-band clamps too.