Help please. 360 off dyno, now won't start in car...

Well it could be sucking air. Check; PCV system, brake booster,Base gasket, Power valve if a backfire occured.
Oh yeah, take a fuel sample. If the fuel is not clear,or ever so slightly yellow, get rid of it.
If it is orange or red it is way past done.That red stuff is hard to light and smokes pretty bad. Pour a few CCs on the floor or in a metal pot and see what I mean. Dont try it with clear gas if you value your eyebrows!