Hi Guys i wont be installing the headers till next year when the car is ready to be reassembled so i wont know for sure if they will fit or not. I bought them off a very well know Mopar collector and all around nice guy who lives in Detroit and has had just about every cool Mopar from 340s to Hemis ,in fact he has a cool ultra rare all original 64 hemi factory lightweight survivor car for sale right now . He told me he bought 2 sets of these headers off a retired Chrysler engineer over 25 years ago and that they are " Hustle Stuff " Tri-y 340 A-body headers i beleive him 100% he knows his Mopars and rare Mopar parts. Hes been into Mopars since the early 70s is highly respected and reputable . I cant find any part #s stamped into the flanges or any other place ive looked and havent found anything to indicate what they are or who made them. Ill talk to him and see if i can get any more info on them, hardcharger.