Hi all.

I have a 91 D150 and would like to change the valve seals this weekend. I may yank the heads if I don't have luck with my little valve spring compressor and air in the sparkplug hole to hold the valve up.
I ordered a headset apex brand AHS2060. It came with 16 o-rings and the felpro kit HS26179PT comes with them also.

Does anyone know what they are used for?

This is a TBI motor with normal LA shaft mounted rocker arms.

Thanks

IMG_9060.JPGAHS2060__ra_p.jpg

I was asked to contribute money to help solve the civil unrest in Egypt, but I suspect it's some sort of pyramid scheme.