This combo might get you close to your goal of 11.6 (emphasis on might), but I don't agree with your engine builder. 12.5:1 compression with a relatively small cam (I won't even talk about the cam/lifter choice :scratch:) and iron heads......well, you either have a detonation machine on pump gas, or you now have to run race gas which will increase the cost of running the car on a weekly basis...and for what? Running low 12's and paying over 7 bucks a gallon for race gas? This should have been set up with a pump gas friendly compression ratio if you were looking for a "budget" build. You can run 11's on pump gas without too much trouble...heck, my junk runs 6.8's in the 1/8 mile on pump gas (that's 10.7's in the 1/4). This is just a waste of money IMO that will cost you more and more every time you want to drive it.
I truly hope you get into the 11.6's like you are hoping, but judging from some of your builders other decisions....I'm thinking low 12's are all you're going to see.