Welcome to FABO from a Sask member on the other side of the province.
Congratulations on scoring your Demon finally:cheers:. It took me 18 years to get the owner of my #'s matching 1971 Duster 340 to sell.
I've got a 1972 340 4 speed Demon also but no fender tag or broadcast sheet:angry7: The '72's are my favorite Demons:snakeman:
I'll check to see if I have the exhaust manifolds you are looking for, i'm pretty sure I do.