74 / 88 Suburban ?????????

[flashed]

I recently bought a 74 Suburban , LS Swapped and drives great , But the interior / seats need help . Had an upholstery shop tell me $3600 to recover the seats , front bench , 2 rear benches .

Have just bought an 88 Burb with better seats , will they be a direct swap to the 74 Burb , Bench front and both rears ?

Also want the Seat Belts as they are 3 point , same question , will they be a direct swap to the 74 ?

My plan is to swap these items if they are a direct swap then resell the 88 Burb once we get it running .
Any help much appreciated , dont have possession of the 88 Burb yet .