587 heads

my recommendation at first was a 1.88 valve But! the 2.02 will give you more cfm, threw the hole lift curve.
It will just cost more to do it.
clean seat and throw some angles on it cheap.
But if you going to put hardened seats in it, you might as well get the intake seat for a 2.02 cut while you there. And i do recommend the hardened seats(exhaust seats)