Valve stem seals

OK. So Im puting my J heads back together, and have a dump question.
Im using Felpro # SS70014 OE style valve stem seals.
My question is, "how does the intake seal fit the valve guide" (its stock, not machined down),??? Does it get pushed down on the guide,??? or does it just get slid on the valve stem, and left touching the guide as the stem goes up, and down,???.
It seems too small to get pushed down on the guide.
I know the exhaust seal dosnt get pushed on.
I need enlightening.
Thanks
Dave