OK -
- The new seals a simple press on type like an LS motor - basically just a cap.
- Look at the pic of the factory seal - it has a flat disk at the bottom - this is the seat - its only a few thousandth" thick because the cage does most of the spacing
That email address is the correct one - yes Craig sells kits, including the correct locater, correct thickness shim ( only used on the intake side) and the aftermarket seals
You will need the correct valve spring press to do this job on the car - Crane makes it and sells it through Summit.