I had bought a set of rubber seals for the valve guides, from Macs. They were not the correct type for my guides, and couldn't be used. That didn't really concern me, because a number of sources have virtually deemed them 'prefered, but optional'.
I was pleasently surprised to find a bag of 16 o-ring type seals in my gasket set. I am making the assumption that these actually ARE for use on the guides !?!?. Can't think what else they could possibly be. Anyhow, the fit the guides, so that's where they have been put.
