'55 vs. '56 door latches & strikers

[dmsfrr]

'56 was the first year for the "Lifeguard" safety upgrade.

The '56+ striker plate on the door post has a screw-on mounting plate that is more likely to 'contain' the door star-wheel inside the striker plate assembly.

'55 style are on the car painted red.
The '56/'57 Lifeguard style latches are shown on the car painted pale yellow.

I do not know if they are a bolt-in swap.
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