Changing a ball joint on a 97 GMC K1500 cannot get factory rivets out?

I am trying to change the ball joint on my truck we grinded the heads of the rivets and popp put the old ball joint but the the bottom of the rivets are very very tightly seazed in the upper control arm any one kno wwhat i can try to get them out. Have tried all kinds of hammers slide hammers air gun hammer. nothing will budge these rivets|||go to a frontend shop and watch them, or read a repair manual|||drill them . first hit them with a grinder due to the fact you might case harden them from beating on them|||I used to watch front end mechanics cut them out with an oxy-acetylene torch, but in your case, I concur with the others. Drill %26#039;em.|||Drill em.|||You will have to drill them out.|||Yes, drilling them is the way to go. When you put the new ones in, bolt the ball joint to the bottom of the control arm instead of mounting it through the top. This will decrease the angle of the ball joint and make it last longer.|||I have always torched them out.