Hello. I'm having a **** of a time ordering these parts correctly from Summit Racing. I’m changed out the Napa OEM replacement stuff I bought a few months back, because the wires were not seating on the dist. cap correctly. I have ordered a MDS#8482 cap/rotor and MSD# 8227 coil. I have received two sets of plug wires to date. A set of ford racing that fit a old style coil and a motorcraft set that will not fit securely at the MDS coil. Does anyone have any suggestions?