Yes this is a suspicion of mine... The Speedmaster heads I got a couple years ago I had looked at and they said the only thing was the lubricant was dried and they just lubricated the valve stems and put them back together and they were fine... Again he bought these Edelbrock heads complete from eBay probably more than 4 years ago and they sat out and in his unheated garage for an unknown amount of time and we just kind of cleaned them up a tick and slap them on...
