Bench Seats, Having them Reupholstered

[SunSoaked]

TKCR-

Couple questions for ya. I love your work BTW!

I was watching a Youtube Video from USA1. They say there is a basic seat and an premium seat. The basic came in the lower trims (Custom Deluxe) and the springs under the foam curve upwards thus requiring a thinner foam pad. Is this true and does that cause the seat to be "bouncier?"

My 86K20 is a Custom Deluxe and it rides like a buggy. The lower foam pad that USA1 sells doesn't seem to say if its one version or the other.

Regarding seatbelts. They sell the 3 point kits but without the plastic cover for the retractor. Do you know if my OEM covers fit their retractor mechanisms?

Thanks!