I am looking at buying a 1955 Ford Townsedan parts car to work on my own Townsedan.  One of the things I'm thinking about doing is changing out my three-on-the-tree for the automatic in the parts car.  This would be a straight swap from one to the other, but are there any pitfalls to doings this?  I thought about the fact that my car wouldn't be original, but it's not like it's a Crown Vic, just a car that's been in the family for about 45 years.  Currently, I am the only one who can drive the car, but one of my daughters would like it if it were an automatic. I'm getting ready to do a ground up restoration on the car, so it seems like the best time to do it.

So what do you guys think?  Thanks in advance.

Mike