Anyone know what this is out of?

[Lynn]

You are going to have to post good pics of the pad and the casting date.

V = Fliint
05 is May
06 is day of the month.

Here is where is gets squirrely. The "1" almost has to be a letter, not a number.

3 character suffix codes started in 70. So, your assumption of the 70 block is rational.

I don't think GM ever used an "I" for the first suffix letter code, as it would cause confusion with so many "I" characters used in place of number "1".

Is the pad the early style (long) or late style (short)? 010 blocks were made for about 10 years.