Damn the bad luck

I finally got arround to setting the engine/trans back in my 69 Dart and I was test fitting some nice headers I picked up about 1 yr ago ,they are new CPPA headers I picked up but the guy wasn't sure what they fit. Well I left the 4 exhaust studs in the heads on the outer ends. I dicovered they were in the way of getting the headers in so I removed 2 of them and then when I went to remove the drivers rear, it broke off flush with the head! After looking at the end I could tell it was rusty half way across. So now out comes the motor so I can drill, tap, cuss, drill, cuss, etc. I'm going to try and drill it and hopefully use a tap to push whats left of the stud in. Or I may have to Heli coil it. My question to my FABO wizzards, Is there a new or better way to remove the broken off stud?