Here are some pictures from Eric of the header rework. I haven't seen it in person, but he says there is plenty of room to that steering shaft...
And from the bottom. You can see the Mocal and the clearance we have now:
The 'new' pipe which is further forward originally tucked right up to the block, which was a nice and tight fit, but interfered with the Mocal. If you were running a remote filter/thermostat, it wouldn't have been a problem. I like the simple installation of the Mocal and wanted to keep it though.
You can see all of the splices he had to do in order to keep a nice radius on the tubes...