I'm doing my plugs on thursday. But just to get my head around them. I'm going to do motorcraft sp-500 platinum. They are AWSF-22pp. My Chilton says for 93 and later 4.0 push rods to replace with AWSF-42PP. Now when I look at parts at AutoZone the plugs suggested, the 42pp aren't a fit, but the 22pp are. Chilton says on 98 and later 4.0 push rods to use the 22pp, and they lost the same for 96 and later explorers with the v6. So I'm I'm not confused by the whole thing and motorcraft's web page is completely useless. So what has anyone else used to motorcraft in a 97 ranger 4.0 pushrod?