have seen a 440 reconditioned engine for sale ( hard to get in Aussie)that has new pro comp heads.I questioned with someone in the know ,and was told to walk away .Are they really that bad.
Had a set of those heads a few years ago. One had bad machining that caused a gap issue at the intake on one side. The head angled away from the intake at rear of engine just a couple degrees but enough to deem that one junk. The vendor replaced the head and the new owner of the car is still running them.
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