I think maybe mid 11's with good air. Watch the oil you use now with flat tappet camshafts. It's not the oil you were probably used to back in the day. Find a good racing oil that still has the right additives needed, (zink and phosphorous are what is primarily being taken lowered). There is a huge argument on another unnamed site I frequent anytime oil is brought up. Suffice it to say that off the shelf street car oils now though are not good for flat tappet cams.
Curtis