I took mine to Dave's Service up near Allenton. I don't know if he dipped it or not. I didn't get billed for it if he did. He seemed to be very knowledgeable on Mopar Flatheads. As I recall, it was $80 to bore and hone .030" over, $35 to mill the block deck, and $25 to mill the head. He also replaced all of the valve guides and seats as they were junk from rust. And he installed new wrist pin bushings for me. Total bill was around $750 and included new pistons and rings. Then before assembly I washed the block and head thoroughly inside and out with a steam cleaner.
I was very happy with his work. It took a while, but then again, I told him it wasn't a rush.
Merle