Well, stupid me when taking apart the heads I did not label the two bags I have all my keepers in and not sure which came from the '94 head and which came from the '99 head. Is there a way to tell the difference? From looking at the two, one looks thicker than the other.

 

The 94 keeper is the thicker one. They would not fit into my Supertech springs where the 99 fit perfectly.

 

Ah, Perfect. Thanks.