I have a small assortment as well. I didn't have any that were exact in size so I tried one that was maybe a millimeter larger in thickness, thinking it would just compress when tightened, and it leaks worse than before. I obviously have the old one, its just hard to measure the thickness since its probably been in there for 30-40 years, if its not original


1969 Nova
454/M21/3.31
Mild mid-11 second weekend cruiser

1994 F150 XLT Super Cab 2WD
5.0/4R70W/3.55
(Daily driver)