Bolt on tuning
You should be able to find someone close that can get you a good tune with HP Tuners or LS1edit. That's the route that I would go with atleast. A lot of dyno shops should be able to help you out with this as well as dyno tune so that you can get the most out of your mods.
the best tune you could get would be with a dyno-street tune where a shop or someone tuned your car with efi live or hptuners

