PF, we're way ahead of you. Once they're off I'm taking them to a head shop (not be confused with a hed shoppe). They'll give them a thorough make over making sure they're not cracked, level, sealed, etc. I might also have an idea of where another set of heads for it might be. Not sure the cost on them though seeing as how the 351m isn't exactly the most common of Ford's engines.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf