Like I mentioned I also started on the front seats. I wanted to save some money, so I ordered the seat covers and foam through Jegs from PUI. I'm sure Legendary's covers are better, but they are also much more expensive. I did get the installation kit from Legendary, because PUI does not offer one. Legendary actually also has a youtube channel that has a bunch of videos showing you how to do it. I'd say it's nearly impossible to do without. I had no idea how difficult this is. I also ran out of hog rings and they are hard to come by. I couldn't find a local store that carries them, so I had to order them online and now I'm waiting for them to arrive.
By the way, I noticed (when the seats were still in the car) that the passenger seat would always flip forward when you stepped on the brakes. Now I found the reason. There's this S-shaped spring in the hinge, which was broken and it fell out when I took the seat apart. Luckily someone in a Barracuda Facebook group had a spare from his parts car and mailed it to me. Sadly it has not arrived yet and I hope it didn't get lost.