I'm planning on buying a set of Doug's headers for my small block 73 dart. Only problem is the catalog listed for the a body (d453) only goes up to 72, and I've read somewhere that it doesn't work with a column shift. Is that correct? Or will they fit on my 73 column shift dart. I'm using a 904 as well because in the catalog it says to run a 727 I need a mini starter. (Not why I'm running a 904 lol!) There is no mention of it not working with a column shift. I just read a few people say that on FABO and other sites when I was researching about how good Doug's are.