5.9l magnum swap questions

Incidentally the machinist said he had a new set of replacement heads (old casting style) for probably around $400 for the set. That may be the way to go

"Old casting" as in factory Magnum heads, or LA heads?

If they've had a quality valve job done on them and the guides checked, that's a decent deal. No shipping, and no worry, provided they're done right.

-Kurt