for the plugs i used motorcraft original ones, because the heads are really deep on the 96 - 98 cobra i had to use a tool designed to get motorbike spark plugs out. take the plastic covers off of the plug wires using a small spanner, mine were hand tight so easy to whip off, take the plug wires out and get the spark plug wrench down there. mine were the stock ones and were easy enough to take out, even after 80k