Upper control arm help

Ok, here’s an official plea for help from any local car guys! I’ve been trying to replace the front suspension on my 67 Barracuda, and have gotten stuck in a ba spot -and need help. Can’t get the upper control arm bolts out, and the old upper ball-joint is totaled and it’s remains are fossilized into the control arm. Can’t put it back together, can’t get it out to put the new one in. Tried oil, fire, every kind of hammer, pickle fork, etc that I can get. Even tried a sawzall (broke that in the process of trying to cut the bolt, but no real room for a reciprocating blade to work) . The nuts are off, but the bolts won’t come out. Can anyone lend a hand or steer me in the right direction?