2nd vote for Broader Performance. I run a Broader built AOD behind the 352 in my '62 Monterey Wagon and love it. I don't know what problems in shipping a trans from Texas to Scandavia would crop up, but I imagine more then a few hurdles would pop up.
The floor of my Monterey was rusted out, so when I built the car, the new floor was made to fit the AOD drivetrain, so I couldn't tell you if you would run into problems with the stock floor or not. That said, you will have to modify the transmission crossmember for an AOD. The mount is about 6" further rearward than the original Cruis-O mount.
The biggest problem with the AOD conversion is when adapting both the Cruis-O bell (Broader), or the Quicktime bell is it limits you to a 11" or smaller custom torque convertor. It is very difficult to build an 11" convertor with a low stall (less than 2000 rpm), for highway use in a heavy land barge behind a big displacement, torquey FE. If you want a higher stall for running on the track or in a lightweight car, no problem. I used the Quicktime Bellhousing to adapt an AOD to the 390 in my '76 F-250. That 390 made right around 450 ft-lbs of torque, and I had 3 torque convertors built to try to get the stall down low enough so as not to cook the oil at North Dakota highway speeds (75+) while towing. I eventually gave up and put a C6 back in it. Hindsight being 20/20 I should have converted to manual since I had a New Process 435 under the bench and Ranger Gear Splitter OD's are much cheaper than multiple custom torque convertors.....
The 3rd option is to order a Bendsten's or Wilcap adaptor plate and use the original AOD or 700R4 bell with a 12" or larger convertor if needed. I have a friend who used the Bendsten's adapter to put an AOD behind his 500+ ft-lbs 428 in his '64 Marauder. The down fall is the Bendsten's adapter pushes the trans 1.5" rearward. This required some "massaging" of the firewall to get the AOD to fit properly.
https://transmissionadapters.com/collections/ford/products/ford-fe-352-360-390-406-410-427-428-to-ford-aod The Broader AOD with the Cruis-O bell adapted to it.
Modified Transmission crossmember.