I found a set of blue cloth buckets in a 2002 Bonneville at the local JY on Monday.
I finally got time to test-fit them today.
To make them fit I had to elongate the mounting holes in the adjuster pedestals. I am also using only 4 of the 6 mounting studs on the driver's seat. The '02 passenger seat uses 4 mounting studs - elongating the holes about 1/8" allowed the seat to fit onto the existing stud locations. I'll also need to make a jumper to connect the power seat harness; the connectors had changed between 1983 and 2002.
The driver's seat is a little too far outboard; it is rubbing against the "B" pillar trim. BUT, I'm gonna use them.
The cloth is so close to matching the original material that you have to look very closely to see the difference.
I was concerned that the smoother, more "organic" style of the newer Bonneville seat would look bad in the car, but I like the way these look and feel.
Took it for a short test drive and I didn't notice any issues with alignment or centering relative to the steering wheel and pedals. I would like the driver's seat to go back a little further; that will probably be a winter project.
New driver's seat next to original passenger seat:
Both seats in position:
View from driver's side rear door:
And I still have room for a console!
I still need to install all the seat adjuster covers, the seat belt anchor covers and finish the jumper for the power seat feed.
And I need to repair a small burn in the driver's seat cover, but that's a lot cheaper than all new trim covers!