Whether or not you need to smog a 1977 Ford depends entirely on your location. Smog checks (or emissions tests) are regulated at the state and sometimes even local level. Some areas don't require emissions testing for vehicles that old, while others do.
To find out if your 1977 Ford needs a smog check, you need to check the regulations for your specific state and county/city. You can usually find this information on your state's Department of Motor Vehicles (DMV) website.
