Joe member prosport on moparts ran a set of them on his low deck 1973 dart sport. If i remember right when he first got them one tube was hitting. so he sent them back and had it fixed. after that they fit fine. also i think prosport was one of the frist to try them and mad dog changed his pattern so they fit better. with thoses headers prosport car ran 9.80 and was 100 percent streetable. but it would be best to pm him because i might not be right. Mopar65