A body small block fenderwell headers

I bought these at a swap meet many years ago, the gasser project didn't happen. I didn't get far enough along to try them and then I sold the car.
The seller said they came off his early A drag car, that and the number on the flange are all I have to go by. If anyone can help verify from the pic..?
I've got plenty more pics if it would help.

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are you looking to sell these ?