The cowl comes off and you do it from underside or take the plenum off to do
it.
Larry

They can be done from the bottom, but it requires a good bit of
dexterity.  You can also pull the wiper module and get them from the
top.  This takes longer but is much easier.

I agree take the wiper box (cowl) off, and the plenum off also. Go buy
yourself a set of wires, and the plenum gasket, and tighten the plenum
side support (the one that goes in the end of the block) last after
torquing the other plenum bolts. As said before "I hope you have the
factory service manual"

Job competed and a total success.  Thanks for all the help.

John Walker