Hello everyone. I have a '69 L78 that had no mufflers when I bought it. Instead, I think it has what are called "firecrackers?" A bit loud for my taste and I'd like to get regular old mufflers for it. My questions are: Is there such a thing as "date-coded or "proper mufflers for this 5E build? And, I've seen 2 different configurations in photos, one with 2 separate mufflers and another with one transversely oriented muffler in front of gasoline tank. ?crossflow? Jerry's book shows only the single crossflow pattern. Are all the pics of the 2 separate mufflers incorrect for this car? Thanks!