great idea on the door lock cylinders,,, didnt knwo u cant get the orignals re keyed,,,,so u must of had keys to the C body locks????
as for the door handle,,most dont know it but,, the 1963 64 65 66 A body use different out side handles from 67 and up,,,but,, dodge pick ups,,used the early A body out side handle with a different plunger,,,truck handle up to 1969 or 70,, i wouldnt be surprised if those handles are the same on the A 100 series trucks and vans,, just change the plunger to fix that handle,,