Now, of course that seems like an idiot questions. I'll prove I'm not that, but the reason I asked is because there might be some different methods appropriate to the Aerostar because of changes in year models, shifter location, and engines. Not to mention that it's really difficult to change plugs in an Aerostar anyway. I've always changed mine by disassembling the lower part of the dash, removing the trans cover, and removing the upper accessories on the engine to allow me to reach back in there. A Ford tech buddy of mine told me that I should try going from underneath. I've never tried that because I don't own a lift, and I have short arms. I'm considering trying it tomorrow, but I'm wondering if I'm going to have issues with the #3 plug. Any suggestions? I'll be happy to take some pics, but it would only apply to the later dash design, and the 4.0 engine. When I get around to getting the 92 running again, I'll be happy to post one for that dash/engine combo.