Problem with straight 1 3/4" headers is they are mainly Hooker or Hedmans. Hooker have a tube that goes below the K frame. Hedmans require cutting inner fenders for a tube.
If you MUST have a 1 3/4" tube, which at 400hp is not useful, then buy tti steps and at least get a decent fit.
The difference in price and minimal HP just doesn't make sense to me to spend the extra for tti over Dougs.