There is not one answer to your question. You need to know the inside diameter of the inner valve spring and outside diameter of the top of the valve guide. Measure with a dial caliper. Once you have these dimensions, Give me a call and I look in our supply of seals. I use the super blue seals, they work best. They let in enough oil to lube but not enough to burn. They will probably outlast your car.

Hemi Cylinder head guy since 1984, I've tried them all.
Best regards!