How to ID correct parts for 71 Dart Swinger

First, keep in mind that the 1971 model year ran from August 1, 1970 through July 31, 1971.

It is also possible some parts were dated well before that since they had to have parts available before the start of the model year.

Intakes normally have a cast in date code.

No dates on air cleaners or valve covers.

If your engine is the original, look at the 10,000 day final assembly date on the front of the block below the driver side head surface. If you want to get picky, any dated engine part will predate that final assembly date.