1970 340 balanced drag motor, +30, 12.5:1 pistons

whats the vin on the block?
Unfortunately the VIN is unreadable. I was readable when I bought my 1970 Duster in 1991, but water, salt and the heat from the header pitted the stamping pretty bad. It was B197571. I think only you can only make out B__757_ and the 5 looks like a 5 or 6. Date code is July 1969.

Price drop $2700