"floppy" door latch

There were some subtle differences in those latches those years. I'd get a genuine '68 latch if I were you. '67, '68, and '69 all have different part numbers, so, something changed. '69 started the forward lock knob position, so, I'm pretty sure that one would be different. Not sure why '67 would be different. Maybe the way you could lock the door or open it without the key or by pulling on the knob?