the 73 had 2" thick? that would explain why my 74 duster seat is so much more comfy than my 69 dart, the dart had about 3/4" foam over the springs. it was in good shape but i added 1/4 or 3/8" to it from the fabric store.
It's taken a while to research this. Unfortunately, I have a gap in my library that leaves me in the dark on the 69-71 models.
In the 66-68 models, extra foam in the front seat could be ordered for LL and VL cars. I could not find this in the 72-74 models. With that in mind, consider that my 72 LL had only upholstery over the foam and springs. My 73 LH had a small amount of padding in the pleats of the upholstery. It's almost like the foam layer found between the wooden inner door panel and the vinyl covering. It's not much but could make a difference. (I guess).
Front and rear HD seats were available, but I don't know what that does i.e. extra foam, stiffer springs, thicker coverings. The seats could be ordered separately, so they do not appear to be exclusive to the A37 taxi or A38 police packages where they are included.
