With moving the seat back you would have to modify where/how the retracter mounts, either go with fixed belts or possibly figure out how to reverse the retracter housing so it fits tighter against the pillar.
there have also been some other discussions about belt installations and you can search for those for extra bathroom reading.
This Post was from: https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?post_id=179254