1971 340 LH23 vin ?

The block has been sold. The buyer was in my driveway when I got out of work today. He checked it over, verified the vin, loaded it and gone... i swear all in 10 minutes. I feel like I'm getting a touch of sellers guilt and should have dug more into what I had before letting it go. Anyway, it's been interesting and I learned that 71-72 Swinger 340 cars were actually built. Thanks for all the input!