Ok I am kind of new to the wideband tuning thing. I really want to get a Nelson Tune when I get my Procharger installed. I have some questions though

1. I want to ditch the FMU and get a custom tune but should I get 42ib injectors and who make a direct replacement fuel pump that will support a cam and procharger on a 5.3?

Also our the Nelson Tunes locked? Reason a local place that does dyno tuning if offering the Wideband commander. Could I get a Nelson tune have Allen control the timing, and trans stuff and get the A/F close but really dial it in with the Wideband tune?