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.
It’s a clearance issue I believe, 73+ has more clearance for exhaust and oil pans. They also sold more ABodies in 1974(duster) than any other year.