Rebuild 915 heads or go aluminum?

1970dartcustom said

ALUMINUM! Spent 1k on my Stealth heads (stock shape/appearance), they are much lighter than stock (like 60 lbs) they flow waaaaay better out the box, have smaller chambers, etc... We had them looked over and squared up for like nothing...
In my opinion much more desirable than some super heavy, very needy, 1967 tech...

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What did you need to have done to them? I was looking at them for a while, but have read a lot of bad reviews.

Hotrod did an article a while back comparing them to 915's. They said they were worth the money, but their dyno results showed about a 10 horse and 10 ftlb increase compared to the gasket matched 915's. That's a lot of money for 10 horse.