906 heads

Well depends on what you are doing? I say if you only have money for cast heads, use cast heads. Aluminum heads are not all that cheap here in Canada. Eddy heads are quite costly. The offshore crap is just that cheap crap. The castings have been known to crack, the valve-train they install is junk and needs upgrading, so be careful what you buy. You can still find guys that can do a mild port and clean up on a cast head if you're not comfortable getting in there with a die grinder. And a good machine shop can do a multi angle valve job at a good price. Buy the correct spring for the cam you are using, and comp locks and retainers. Just my 2 cents.