I put my Autolite plugs in and several are very close to the headers. The heads are aluminum Dart Pro-1 and the headers are Hooker Comp Plus. Year is 72. Angle plug boots have heat socks and the headers are heat wrapped but the boots are almost touching the headers on three plug wires. I was wondering if shorter spark plugs exist? I don’t have the plug PN at hand. But this has to be a common issue.