Good morning,
Thought I would post an update from my initial post last night. The parts manual shows the interior and all the major components, however it does not show the front or rear seat cushion slings. Or as the manuals refers to each, "canvas seat supports", and only refers to their existence by including a narrative that the parts are not shown in the drawing. This morning I got on the phone with Airtex hoping that maybe they might have a knowledgeable staff member or drawings of how the slings are installed in the aircraft. Neither being the case. I spoke to the owner of the company and he explained that in the 20 years he has owned Airtex, my request was the first they have ever had for the Bellanca Cruisair seat slings. It's obvious in the attached photo that the larger sling is for the rear seat, and I still have something very similar installed. But the two smaller slings have me scratching my head and thinking that there must have been a metal frame of some kind that the canvas slings were part of.
I can continue to use what I have, which is 1/2" plywood with square cutouts for the butts with 3" cross webbing. Or I can modify the Airtex sling. I have several other possibilities that will work to get my butt lower in the seat so I stop hitting my head, The problem has increased with the new upholstery. Darn, one thing always leads to another.
Scott