I have done this on two of my 55 Plymouth 4-dr sedans. I installed
three-point retractables from a Mitsubishi pickup truck. The 56 Plymouth
is the same as the 55. I MIG-welded a 7/16" fine-thread nut to a larger
heavy steel fender washer. Then I plasma cut a hole in the B-pillar 6"
above shoulder height to allow the nut to go in and sink the washer flush.
I then MIG-welded the washer all around its outside edge to the B-pillar.
Did the same on the floorpan for the other anchors. I selected the spots
on the floor that have wells and channels pressed in them because these
points resists flexing.
The retractor mechanism is the tougher job. Its anchor needs to go high
enough to allow the bench seat side fenders to clear. The profile of the
retractor needs to be under 3" to clear the seat back.
Tou can can me to chat about this at 408-897-3100 (California).
Richard Main
>Hi All,
>
>We're still trying to work out our seatbelt problem for the 56
>Belevedere. Mom still wants a shoulder strap in addition to lap belts
>at least on the driver's side. Several vendors have three-point
>systems but no one can tell me whether the anchor plate will attach
>securly to the B post in the 56.
>
>Has anyone done this? Or know whether it can or cannot be done?? Can
>a support be welded in or is there enough steel behing the thin metal
>trim to work with?
>Or, does anyone know of any other style shoulder belt that would not
>need the post anchor (comes up over the seat from the floor behind)??
>
>Any help would be greatly appreciated.
>
>Thanks
>Joe (and Jason)
>56 Belvedere
>
>
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