I just got my motor back together with a carb block and turbo 300zx injectors. According to my air fuel gauge im almost running lean. The car felt slower during the first test drive. It goes to the lean side of normal in the upper rpms where before it used to be rich. I hooked up my 5th injector and some power came back. Not quite normal yet. Im going to put my old injectors back in tomorrow and see.

Did you have the injectors cleaned/flowed?

 

Chances are if they are old, they need some love.