Good luck. Found my coated Doug's on ebay but still payed 700 bucks. Look at the Sandersons. Call them and talk to Francisco. They are great price and good quality. I would have gone that route if I didn't buy the Doug's.
I have a used pair of black jack headers off my 67 barracuda they were on my 318. Not sure if they fit the older barracuda but I have collectors and everything, No shipping but I will sell it all to you or anyone for 25 usa dollars.