Purchased a 1963 1/2 Falcon Sprint with 289 based 347 stroker. Owner said the heads were from an 89 Police interceptor parts car. Heads were rebuilt with new valves, springs, roller rockers and light port job (basically junk). Engine still made 375 on an engine dyno according to the sheet. Regardless, this makes the heads E7 heads, which should use a Motorcraft AFS42C plug (SP450). But, while waiting to get the carb back from the rebuilder, I pulled out Motorcraft AGSP32C plugs. Just confirm for me that this dummy was using the wrong sparkplugs. Attached photo of head and plug that was installed.
95.6 KB Views: 31
127.1 KB Views: 30