It depends on what you want. If you still have the original mounting points on your CV cross member that should make it easy - at least for that part. I have a 4.6 from a Mark VIII, the 4r70W, and IRS going in my truck along with the CV IFS and possibly the P71 driveshaft. It will be a few weeks before we start the engine part of the swap.
This article shows some pictures of the engine in a '56
1956 Ford F100 - 5.0L V8 DOHC Engine - Truckin' Magazine