Seat options ’83 Cordoba

So I bought a low mileage '83 Cordoba to use as a daily driver and while the car rides well enough, the 60/40 split bench is possibly the most uncomfortable seat I have ever had grace my ever expanding posterior.

Are buckets any better and from what cars will they bolt up ?

Additionally, the shoulder belt seems to always be contracting, cutting across my neck. Is this normal for these J bodies ? Sorry for the newbie questions, but my other Mopes are somewhat older and lack such fancy accoutrements.
Author: 5wndwcpe