Looking for information on 1970 340 4-speed Swinger.

Hey everyone... I'm hoping to find someone that has any info on this car. It's a 4-speed 70 Swinger 340 that I know has spent quite a while in Michigan, and had a Michigan license plate of "MS MOPAR" at one time. I also know that it spent some time in the 80s in Pennsylvania. I know it was at the Mopar Nationals at least twice. I'm hoping to find someone that knows a little history on the car. It is missing its fender tag, and I was hoping someone possibly had a picture or pencil rubbing of the original tag. The guy I bought it from said he found a shredded build sheet, but it was so bad, he couldn't make anything out at all. Any information would be appreciated.
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Thank you.