I think Nick's main problem is that the latch looks pretty gunked up. But it does look a bit lightweight at the corner, as in aftermarket.

Here's Twin Jimmy's and Nick's latches side by side.
Attachments
Door Latches - orignal vs aftermarket.png (1.29 MB, 88 downloads)
Door Latches - Original vs. Aftermarket?

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.