Looks like you have a lot ahead of you. I used a TCI frontend kit in my 55 and am very happy with it.As for swapping out the rearend,I would wait and see what kind of engine and tranny you are gonna use.If you use an overdrive tranny you can use a 3:90 or 4:11 rear and get good fuel mileage.On the other hand if you use a 350 or 400 turbo,or a regular standard you will probably do better with a 3:08 or 3:23 rear.Just my opinion.