head casting number 4772576?

Jack,
They were flowed the same day about 10 min. apart, I know I was shocked also as I didn't expect them to be that good. In the performance catolog they said that they were the best stock flowing head to date and this was in 2002 catolog.
Most everyone over looks these heads from mopar because they are all after aluminum ones. This is just to make everyone aware that there is a alternitive available in iron thats new.