I would go with the comp pro magnum lifters, they are designed to act like a solid- giving you more rpm capability.
Too bad you're far from here, my brother and I were talking about selling his 63 max heads, they made 750 horse, ran low 9s-8? in a tube daytona.
The ports on them make my -1 ports look like 516s.
And, IIRC, they have 64 cc chambers