Holley tubular swap headers MIA on website. Reason?

I personally think they didn't do enough homework when designing their A-body swap kit. Think about the K-member required for their parts, 73-76. The A body died in 76. That's only 3 years of production with that K-member and its the least desirable years. If they would have used the 67-72 K-member for a basis of design, they get more production years and the more desirable platforms. Mopars in general have a smaller following than Ford or Chevy so from a business standpoint, I think they failed big time. I can see how this decision could have made their sales low when there are other solutions out there like TTi and Shumacker.

Could be. I personally like the '73+ k-frame better regardless of the year of the car due to the sway bar mount and better motor mounts but they are certainly harder to find.

Thing is, they don't have any E-Body or B-Body swap headers anymore either. Those were a beautiful set of full length headers and the whole installation looked really clean based on the YT video Holley put out on it a year or so ago. I can see the A-Body parts being hard to move, but B/E-Body headers sure seem like they would be popular.