Ok I know I have asked about my spark plugs before (not having a wrench to fit). Still no luck.........one person tells me that it takes a special type of spark plug wrench, someone else tells me hat I have the wrong exhaust manifolds. I have a 1968 Mustang coupe with a 302. What is my solution to this problem. I changed the plugs when I first got the car with a spark plug wrench I borrowed, and lated changed out both manifolds, with manifolds for a 302.