I have ran across a set of heads, that have just been resurfaced , 3 angle valve job, and new screw in valve guides, been cleaned up completely by keys machine shop, I've ran the casting numbers and they come back as 305 h.o heads. Any good?

 

All that info is in the sticky above, it will usually tell you if they are decent or just nothing special. There were some HO 305 castings that the circle track guys love.