Looking for Info: Comp Cams 766-1 retainer

I thought the dash number for retainers was how many. Like 766-12 would be for a slant 6 for instance, while 766-16 for a V8. I think that's how it is. That said, I caint find a DANG thing on that 766 part number. Are you sure the number is correct? Not a typo? And have you tried calling Comp? I know.....usually worthless, but it's worth a shot.
No, I have not called Comp. I wanted to try here first. It seems that they are for bigger valve stems and unknown lock angles.

I probably cannot use them, but I wanted to see if there are any available specs listed for them.

Thanks for the help guys.