When you do the swap, you want the mustang next to your Ranger. What you wanna do is move everything from the Mustang to the Ranger. Computer and all. Its not that big a job, just time consuming. And take your time. The SVO intercooler is going to be a problem. No room for it in the Ranger Engine compartment. You'll need to come up with a conventional intercooler
Transmission, I have the low horse version Merkur Motor in mine (145HP only 8-10PSI boost and NO intercooler), stock trans has worked great, 190,000 mile and no issues. The SVO is 205-225 HP depending on the version you have. Stock trannie may be a bad idea.
One thing I forgot when I originally did mine 14-16 years ago, I forgot to change the fuel pump. Remember, you need a high volume pump.
All the info you need is on the internet, do a lot of searches and a lot of research. For example,I kept my Dual Plug Head, the directions on how to keep the Coil Packs and the ICM were readily available.
Buy the hood scoop also and attach it to the Ranger hood. It looks cool.