Well, to be honest it is a bit of a mystery. The vin tag, the fender tag, and ownership history claims it to be a 70 swinger 340. I bought the car from a raffle winner who did not make any claims of proof about the history. He owned for about 10 years so it is now difficult to get good historic Intel. Bottom line now is that I own the car, it's real nice but should I consider going with a Rally dash. The 340 engine is not original but runs great. Car drives nice.