Join Date: Jan 2001
Location: Knoxville, Tennessee
Re: How tell if correct, original engine for car?
As noted previously, there really is no way to know for sure if your engine is "the" original engine for your car. However, I would suggest looking at the engine assembly date that is stamped into the machined ear on the block in front of the driver's side cylinder head. If that date precedes your car's build date by 1-10 weeks, chances are the engine is original. Components have probably been changed over the years, but you can also check their date codes to check originality.
65 Mustang Convertible 289 C-code
Rangoon Red with White w/Red Appointments Deluxe Interior