Early A door lock conversion

So I recently ran into the problem of not being able to find replacement locks for my 63 Valiant. well, I did find a set of restored ones on ebay for 189. dollars but with that being a bit more than I want to spend to secure my car, I had to consider options.

Thanks to the insight of @slantsixdan and @65 Dartman , I concluded the solution was to upgrade to the more readily available 66-8 lock set which I found on ebay for 30. dollars.

This is how I did it.....

First we have the valiant door as its been for the past 54 years. I don't have the key that goes to this lock and I cant even get any other key in it because it is jammed and wont turn voluntarily.

After removing the door panel and the window crank, inside latch handle and the arm rest...I gained access in the door and removed the cylinder. You can see it with cylinder removed, a very unique upside down key hole shape.

also pictured is a bare 1971 A-body door that shows the end goal of the keyhole we are after