Hi! turbo choices could also be VW KKK units- k03 and k03s can be had cheap and souns a good size for you, also td03 turbo from a toyota starlet.
With super unleaded and low boost you may get away with standard ignition map.
Fueling can be run from a "piggy back" fifth injector set up, driven by megasquirt or a fifth injector controller. Good luck