When we did Otto's heads / gaskets, I just undid all the head to manifold bolts and left the complete exhausts supported in the bay. I can imagine that would be a little trickier with the whole set of lumps coming out though.
So you took your heads off to change your plugs
No seriously it’s a spares car that has a 15-20k top hat linered engine. Peeps keep trying to buy it off the drive so it’s time to take off the good bits
Cos I have a use for them
J