The difference in latches is immaterial if he already has the later doors, but what he'll need to do is splice in the later strike plate mounting area into the lock pillar. Probably actually easier to do than to adapt a later lock to an earlier door. Although I don't know why someone would want to put earlier doors on a later truck.
To answer Phil's question, it looks like the later strike plate has a longer vertical spacing between bolt holes, so even if the strike plate would fit in the recess, you'd have to deal with the hole spacing. It looks like the later strike plate has some of the workings forward of the lock pillar surface, so might fit recess-wise.

Last edited by klhansen; 10/24/2025 5:46 PM.

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.