I'm the 4th owner of my 35th anniv. Vett. And I'm intrigued by the adds for 10 to 30 more horses offered by a variety of exhaust system sellers. Seems like the cheapest bang for the buck. Problem; this car may already have one of the "improved" systems. Therefore my question. Is there any (reasonably simple) way to confirm that the car has/has not the OEM mufflers?