It can be confusing but 1971+ Winchester Gray
Was PPG formula 2314, but coded A4.

1969/1970 Silver Poly was PPG formula 2016, and also coded A4.

They have a noticeably different appearance because the mixes are different.

The ‘69/‘70 2016-code mix is the one I was chasing and seem to have nailed down.

Lots of black accents goes great with either.

Mine originally had black top, black lower body (69 gtx), black hood stripes.
A lot of that is going away for personal taste reasons as this is definitely not a
Strict restoration, but it will have enough black left to give some contrast.