Manual Swap on a 05 mustang v6

I currently have a 05 mustang convertible, I love my car very much but looked into something new but decided to keep my mustang. How much will it cost me to get my automatic switched to a manual? I do t want to get a new cause it only has 34,700 miles on it and it’s still like a new car, so that’s why I believe it should be better to that than buy a newer car. I love manuals and would Like to install on it and later do some engine work.
 
You've posted in the wrong section...this is for 2015 and up mustangs....you want the s197 section.