03 Frontier 4X4. Replacing control arms. Read some other threads on the topic. All the bolts came out fine except the rear lower, it’s the special one with the splined head. It ain’t budging. PB Blaster, tried a little heat, afraid to burn up the bushing, which looks difficult to replace as well. Any tricks? I could sawzall the thing out, but $25.00 each and 2 weeks shipping to HI.