I have a 1966 mustang with an engine that I was told came out of a 1985 engine but someone told me they think it's a 1983 Mustang 302 HO. It had a holley 4 barrel carb and someone told me the markings on top of the motor indicate it was a 1983 302 HO. Does anyone have any information of any sources that describe these specifications or anything that can lead to me identifying the engine properly? Please help. Thank you.