Maria - The vast majority of our trucks have a PO (Previous Owner) addition or modification of some sort - LOL!

I should know as my '51 has so many (I'm still finding them after all the years I've had it) of my Grandpa's "modifications" and "improvements". Those kept the truck running and useful to him over the decade before the truck became mine. The inside rearview mirror that came with the truck when I got it turned out to have been from a 1962 Cadillac. I think he used it first because it was what he could find for cheap but it also provided a wider rear view than the stock mirror and it had the little flip lever to stop getting blinded by lights from behind at night.
Nope, no "frivolous" additions. Just things that either kept it running, reliable or provided something he needed or wanted. I plan on keeping the vast majority of them just like he put them in.
