Quad X ring for Thermoquad primary well seal

I understand they are Called quad X rings????? seal up the primary circuit . When these things leak the old 1972 Chrysler service manual says it will cause a RICH mixture , are you kidding me ???.....never seen a TQ puke more fuel in my life .But I guess they are not O Rings .....Thanks
I just got in a carb kit for TQ from NINJA and it is just a WALKER , hope it works !! Fourth kit...ugh