Retune my entire carb after installing new heads?

I've spent quite a bit of time trying to find that "fairly easy" tune without success. All combinations of ignition timing, idle mixture, bypass air, especially without a stinking rich, plug-loading exhaust.

So next time you're in my neck of the woods, come on by and show me how easy it is... this is the Show Me state, after all :p
I've tuned a 13:1 528 stroker with a .780 lift solid roller to idle at 950. It can be done.