Wow, this post is wrong in so many ways it caused me a headache

I'm sorry to say but you're over your head with this one.
Once again, for someone to perform
successful head swaps, they need to have proper equipment, experience and know-how.
You have none of these.
Do you own/have access to a clean room? Without it, you're just spinning your wheels, even if everything else is done correctly.
Do you have proper equipment/technique to swap the heads? Without them, you'll destroy the donor heads and cause damage to patient surfaces.
Assuming you do everything right, you will need to convert the drive to SATA so you can clone it using a hardware imager (which you don't have) after you've solved other problems that will come across your way.
On top of all of that, you're most probably talking about a Shrek drive which complicates things due to this family's peculiarities.
To sum it all up:
You need to choose correct donor -- and yes, Shreks are picky
You need to practice on countless head swaps on dummy drives to make it right
You need to perform the head swap on a clean room facility
You need to convert the drive to SATA
You need to work with family peculiarities on firmware level
You need to use hardware imager to image the needed data.
Good luck!