Hello Charlie!
Well, unlike cutting into people, you'll face a lot less blood, but remember, the parts should be interchangeable... as long as your two fish are both the same Mark and MOD!
The only qualified Navy torpedo man who still has some experience with these weapons is our good friend Bob Pallat (Cleveland)... if you run into problems, I can provide a phone number of email. Save the parts in coffee cans (what we did with out Mk. 14s). Good luck!
And say hello to Bob for me.
Paul Farace
USS COD curator