Take a look inside the driver door. You might still have this VIN sticker. If you do, you will know the built date. What you have to know is, the last six digits are the sequential numbers and it begins with 100001. The smaller the number, the earlier it was built. As you can see, my sequential number is 276921 and it was built in january 1971, so, your sequential being higher, it was probably not built in 1970.
Robert