[bly]

Need some help identifying some heads I have aquired. They are aluminum, they are for 351W and have a AR stamped on them. They are not AFR's.
I was told they were purchased in the early 80's, also the AR is for Allen Rute or something like that. Anybody have an Idea what i might have here, would love to find out some info on them. Thanks for any help BLY.