Hi The guy in tenn that i sold that head to is Randy Head. His # is 615-330-3558 or his brother Don Head can be reached at 615-417-9575. Just tell them Bob Cook gave you there #s and that your wanting to know if they still have that 1650 deisel head i sold them a while ago. Thanks and good luck.  They are great lads, you will enjoy talking with them. Bob Cook