[mcskier]

How do you tell if your car is orginal I always see people posting matching numbers car how do you know?

[EagleAutosports]

It depends on the dates that both the car itself and things like the engine, tranny, rear end... are built. The build dates for the parts must be within 30 days of the build date for the car.

[mcskier]

Does not answer question were do I check for those numbers?

[red65]

Most generally, the VIN number has a sequence of the last 4-5 digits, or more depending on the marque, that are common on other VIN marked body parts. The engine, transmission, etc. should have the same numbers if it is correct. If you are wanting a totally correct original car then this would be important from a purist and value standpoint.
Some vehicles do not have engine/drivetrains that match the VIN most notably Ford Motor Company. They simply have a cast iron/aluminum casted number or date that corresponds with the cars/trucks build date etc. They originally did this for quality control to know who made mistakes and what shift the parts were made.

[4Dhorsemen]

Where at on the engine do i check for the numbers???? 289