Yeah I have read about that "secret" for getting to the back plugs and will most likely do that. Luckily, my own driveway has a slope to it so I won't need to be parking on some random street.. lol. However, any ideas on how to find out the OEM part number? I tried just taking a look at the wires on their now but they are pretty dirty and not really much surface area with printing on them to really make heads or tails.. unfortunately I don't have a local AC Delco dealer that has both parts and I really don't want to go to the dealership. I guess I go back to my original question of, what's the diff other than 20 bucks for the two part #'s? I am just wondering if it will make a huge difference based on the fact that I really don't plan on keeping this car too much longer (possibly selling this spring/summer) and I'm looking for ways to cut my costs down while tuning up and prepping for sale.