Assembly line correct brake booster check valve
 

Assembly line correct and installed power brake booster check valve. Very hard to find raised ridge in the center with three dots. Works perfectly. Perfect for Survivor 60 dollars shipped to the lower 48. https://www.yenko.net/ubbthreads/pics...3_19.03.08.jpg
https://www.yenko.net/ubbthreads/pics...3_19.02.53.jpg