1972-93 Truck seat question.

Sorry to be a little off topic, but I can't seem to get a definitive answer anywhere else, and this crowd never seems to fail me when I need good solid info!

I have an 85 bench seat that needs recovered, and need to know if the upholstry kits from other years will fit the seat. I really want the 72-78 style in vinyl, over the factory 85 velour 'big comfy couch' look.
Does anybody know if the seats changed size over the years?
Has anyone used an earlier upholstry kit on a newer seat?...or vice versa?
I'm looking at kits from stockinteriors.com, if it matters.



Thanks!

20200411_193205.jpg