Got the header laid out, cut, and fitted. Took some time! I'm using 321 stainless, so even the tacks have to be back purged.
Got all the primaries within 1/2", cleared everything, including the tire at full turn and compression. Also have good access to the plugs and flange bolts.
These actually can be removed with the engine in. You do have to play a little Tetrus, but I've done it a few times now!