I have bought some 3inch edlebrock headers with a 3 inch hooker cat back and then the 3inch in/out oval car sound cat for my lo3 formula. The hooker cat back has a flange on it where the cat is suppose to connect but the cat doesnt have one..also the edlebrock collector doesnt have teh flnage either so the cat will slide on that side..... plus the cat is about half the size of the original one.. which cat can i get that will fit in teh sock location with the air tube that is 3 inch in out? i was thinking catco but the thing is i only need the flange on one side....