well we got all the plugs in. and it seems to have fixed the miss.
after doing the first one we realized we needed a longer extension to get the third one out, so we drove and got one, and then opened the hood to work more... only realize the painfully obvious fact that the engine had warmed up while we drove and we couldnt work on it at the moment. so 2 hours later we got them all swapped out and GG says all the power that was missing before seems to be back, and the vibration at idle is gone also
the old plugs didnt look too bad, but comparing to the pics in the chiltons guide they looked a bit overheated.