The factory 261 can be found on eBay but it takes patience. Original used PVCV valves need to be checked and cleaned. Apparently there is a small spring inside that may break or seize up.

Open end ties into intake manifold (3rd pic)
Attachments
IMG_1969.jpeg (403.71 KB, 148 downloads)
IMG_1920.jpeg (243.76 KB, 146 downloads)
IMG_1918.jpeg (222.57 KB, 153 downloads)

Last edited by tom moore; 05/08/2023 8:46 AM.

1946 GMC Project
"Back-in-the-day Restore"
Read the story in the DITY Gallery