Is it okay to keep the stock ECU as is while doing the single conversion? Also how long would it take a mechanically inclined person to install a single turbo on a twin setup (I already removed the twins, so just the install time for the single)?

 

Don't even bother... you will need at least a Power FC.

 

You have a lot of searching and reading to do my friend..

 

Lots of these threads around... do a search in here and the 3rd gen section you'll get all the info you need.
Closing thread.