Finally the decision has been made.

Thanks I was looking at those springs! Do they work with factory umbrella seals or did you have them cut for positive seals?
No, I had to use the positive seals.
Here:

COMP Cams Valve Seals 521-16
Or:
COMP Cams Valve Seals 514-16
I can't remember which. One is designed for triple springs (521)