1. No real header will fit power steering. Ever.
2. What Hooker or Hedman header part number are you talking about? I don’t care what name is on the box, a 1.875 tube will hang lower than a 1.625 tube. It has to.
3. I don’t do step headers and a 1.750 tube is good for a pretty much dead stock 318-340-360. You want to make power you use a 1.875 tube.
If you are buying your headers from a parts store or some off the shelf junk from Summit or Jegs you are wasting power. It looks like they make a great header. The price doesn’t bother me. The dumb step design does. If they made a straight 1.875 tube header that would excite me.