I was fortunate to find an original set of B-Pillar Roadster brackets to replace the ones that were on my car. They had been cut and then poorly re-restored.
This photo shows the replacement set and you can clearly see the difference between the driver side bracket on the right and passengers.
This is the backside of the brackets again – driver’s side on the right.
The reverse side of the brackets – again driver side is on the right.
The base of the B-Pillars – drivers side on the right. You can see the 3 holes in the base of each bracket. These are to rivet the B-Pillar to the sub-floor.
At the base of the B-Pillar the red arrow is pointing to the indentation that matches the profile of the sub-rail.
With the B-Pillars standing (drivers side on the right) the red arrows shows the indentation in the B-Pillar casting that matches the sub-rail profile. The yellow arrows are pointing to holes that should not be there. They will be welded up.
Finally the drivers side B-Pillar has the part number stamped into the backside of the bracket.