I have the Mopar Performance R/T iron heads and love them. I bought mine for $580.00 shipped brand spanking new on eBay. One head was assembled, one was bare.
Do you have direct back to back comparison flow bench numbers to prove this? I heard they flow almost as well as the MP R/T heads. Shady Dell says the R/T have the best valve job they have ever seen on a production/aftermarket head.
I also have two sets of factory production heads that will be going on small blocks in the future.