so I have the below pictured heads and really cant find much info on exactly what they are. When I bought these quite a few years ago, the seller told me they were from the Arrington truck racing team. These heads work on a standard 340 block, require pushrod oiling or spray bar. They have a W7 intake and a W5 exhaust with 2.125" intake valve and a 1.60 exhaust. It came with T&D rockers and need to be used. the only markings I was able to find on either head was DRE 91314. Any kind of additional information someone would have to kind of see where these things came from would be greatly appreciated. Thanks!