Thanks for the photo.
I am still not able to locate an OE replacement style master cylinder with the double hoops.
The link you sent doesn’t offer or list this part anymore.
They haven’t responded to my inquiry yet. You may have gotten the last one from them.
A couple of eBay sellers won’t confirm what’s inside the box and or even attempt a visual check.
The stock Ac Delco photos these vendors show are of the old style and need to be updated.
I’m not giving up and will still try to find this old stock/style of master cylinder that matches the photos.
I am upset with AC Delco with numerous calls, misinformation and failure to admit the different style brake part now offered.
Still waiting on the dealership to see if an older stock part is still available.
Maybe someone here on the forum can help find this elusive part.