Dyno'ed My 360..it's a pig..what next?

Not necessarily...but I need to start somewhere. Spending time tuning to see what the current setup can really do BEFORE I go throwing money at parts makes more sense. With a proper tune I might be completely happy...or I may decide that I need to start giving Summit part of my paychecks for a while. I started this post thinking there was a defect/problem with the setup (aside from the A/F). Now I'm realizing there isn't anything "wrong" with it aside from not being an efficient power making setup. That doesn't make it a "bad" setup.....just not one that makes a ton of power.

Where I go from here will be dependent on how the car feels once it has some good fuel delivery.

Okay, I'll go back to my advice about taking it back to the dyno shop and let them tune it for you. Not to begrudge the previous tuner but as you say it's not efficient. I'd pay the dyno shop to get it as efficient as they can and live with the results before I would give Summit my paycheck. As stated before, you seemed happy until you found out what it actually made for HP. I'd drive it and enjoy it if I were you.