Did valve stems to fit orig retainers, don't know yet if they can do. Will they crack?.. Anyhow, assembled them by this: put heads on without gasket, just snugly to see if in-valve meets head. In start did. Several times re-do and grinding the pocket where touched.. Finally no contact. Put copper-gasket between and crancked. No sound or feel of contact.
Will this be enough? Didn't modify pockets otherwise. Just put engine to roll?