Modern seats in a 67 barracuda

I think they used that module from 96-00
Mine are from an 03 which did not use that module to lock the belts. They just rely on inertia to lock the belts. You do lose the pretensioners that work with airbags, but with no airbags its not an issue. :)

I like the Sebring seats so much I bought a 2nd set in a pick a part for a 2nd 73 Duster I have been working to make drivable.
The purple Duster took quite a bit of work because I changed the floorpans to fit a 545RFE trans.

In my gold Duster installation was much easier. I cut off the front mounts where it rivets to the rails on the seat and cut off part of the rails that looped lower than the rest.

I lined up the rear door side mounting hole in the seats with the bench seat hole in the floorpan first and enlarged it slightly to fit a 1/2" bolt. On the front I welded on a short piece of flat 1/4" steel with a 1/2" bolt welded in to go through the floor using the stock bench hole which had to be enlarged slightly.

On the front tunnel side I welded on a short piece of square tubing to get the right height and welded a 1/2" bolt in the center to go through the floor. For the back I welded on a piece of steel and bolt similar to the front door side and used washers underneath to adjust the height. I used large washers with lock washers and nuts everywhere to help prevent pull through in the event of a crash and will eventually go back and add some larger plates to the floorpan for some reinforcement similar to the old seatbelt mounts.