I have a 1970 Mach 1 with a 351-c 2V heads. i had the engine rebuilt and now use an Edlebrock Performer intake which blocks of the waterports. I have search for a place to locate my aftermarket temp gage but I don't readly see any. I'm told the heads have plugs that can be removed to accommodate a temp sensor. I'd like to know where the most accessible plug is located before I start removing engine parts. I'm running an A/C and have Patriot headers.