Don't know if I've posted this little pearl of genius or not before,
but if all you're trying to do is access the coolant drain bolts, I
took my lower shrouds off and drilled access holes(forget the
diameter, but prolly no bigger than 1.5") and then fabricated plugs
to fit in the holes for the 99.9% of the time they will be
installed.  the only problem is that now, the exhaust nuts/bolts
won't be getting their annual on/off exercise and may corrode,.  I
used SS cap screws and SS nuts and blue loctite (like it was going to
survive!!.  I'll make sure I post as to the next time I have to
remove the shields and see if I was wise or foolish.  does take the
hassle out of the coolant drainning though.

DM&FS

PS  Has anybody kept a supply of those backflushT's in their spare
parts kit just in case a heater hose goes?  Maybe there are straight
plastic barbs that do the same thing, I dunno.