I'm still confused about the correct chrome mirrors for a 1970 GS. The mirror in the pictures is a left hand remote (looks like NOS). I'm not sure if it is for a "big" car, or if it is correct for the '70 GS (I know it's not the option my car was built with). I just want to know the correct application, it seems too big for a GS. The pictures include the tape measure for help determining application. It does have the DRAIN hole, and it has the Tri-Shield. It also has a casting number underneath D60371 - 401. Let me know if it is for GS or "big car". Thanks!