Volvo RWD 120-130 Forum

It really depends on how much work you want to do. 240 front seats fit fine but you'll need to modify the mounts. I swapped 140 frames on to my 240 seats so I could use the single front mount. I then welded anchors under the floor for the rear mounts. The 240 rear seat bottom will fit. Not perfect but it fits. The seat back will not. Because I was using a complete 242GT interior, I removed the skin from the 240 seat back and re-skinned the 122 seat frame. It looks like it belongs.

Seat belts are a bit more complicated. Unless you want to open up the rocker and install a retractor in there (like the 240), you're stuck with an exposed retractor. Then you've got the center anchor to deal with. you'll need to work with whatever anchors match whatever seatbelts you choose to use. I used a 240 center console and parking brake so the seatbelt anchors were incidental. Later 240 series cars had non-integral anchors so there would be no need for the center console, you could simply bolt the anchors into place...the bolts are there. Just make sure your seatbelt clasps and anchors match. Earlier 240 belts will not work with later 240 anchors.

Hope that helps...
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Dale