I had purchased a new set of Accel plug wires last year, and finally got around to putting them on the car. When I went to pre-fit one on the distributor cap it wouldn't "snap" on. It wasn't even close to being snug. I took the set back and looked at some of their other brands which also had the same type of open connector with a slide on bootie. None of them even came close to being snug on the sparkplug I brought in with me. I finally had them order me a set of Bosch wires as they were the only brand that fit snug on the plug and they didn't have the slide type booties.
Has anyone else experienced this? Seems plug wires used to fit no matter what brand, maybe my setup now is just different.