I just got wind of a great deal from a friend who has some 351 Windsor heads he'd be willing to give to me for a cool $100. They are newly hot tanked and rebuilt with a valve job and all. I don't know what size valves yet. Anyway from what I've read everything says it should be ok. The casting # is D7OE. I'd be putting them on my 66 289. Whaddaya think?