I bought a Canadian 1912 touring that was owned by the same family from new. Had been on loan to a Museum from 1949 until fourth generation millennial family member took it out then I bought it.
My plan is to not restore it and drive it the way it is. It has a couple of things wrong like the intake and hub caps being wrong. Should I change things like that or leave them and just replace what is missing.

Joe, can you post a picture? That'll go a long way in getting member's help and advice.

leave it as is get it running and drive it

Joe, I also have a 12 touring that has some parts that are not 100% correct, It was owned by the same family for 61 years. Restored in 1957. Correct it or leave it, to me its not worrying about, drive it and have fun. I got over worrying about these things years ago, the average guy doesn't know the difference anyway. The point is to have fun, my opinion only.

The things you mention are easily changed, or changed back. They're just bolt on things. Do as you wish. It's your car. If you remove them and replace them with the 'right' parts, keep them in a safe place in case you ever decide to go back.

If they have been on the since 1949, leave them or take off and keep that's up to you. If you leave them and anyone asks, just tell them the history of the car.

If you plan, as you say, to "drive it the way it is" then there's no reason to change anything. Just go through running gear, brakes, etc. and drive it.

If your plan was to restore and show it the answer would be different.

By all means obtain the correct, original parts so that you have the option of going either way whenever you choose.

I agree with Mark, I would just pick up the originals as you find them and have them on hand. Meanwhile, enjoy as is. As a driver, most people won't care or even notice, and after all, it's part of the car's overall history and that is what makes it unique! Enjoy what sounds like a nice early car.

Just replace what's missing & maybe the thrust washers. For now.

Many good points here and I think I will gather the correct parts for it and just leave them on the shelf as mentioned above. Thanks for the input. Sorry I can not post a picture of it here as it is beyond my technology.