1994 Chevrolet Camaro removing starter having issues

I have tried everything I can think of and I cant seem to break loose the two bolts holding the starter on. Ive sprayed pb balster on them, tried using an impact and still nothing. Other issue is do I have to drop the y pipe to remove the starter once I get the bolts out or is there another way. If not what all do I have to do to remove the y pip out of my way. Any help would be appreciated thanks.