I have just finished removing my rear lower control arms due to the camber adjuster bolts being seized in my NT. I managed to bash out the right hand side bolt but had to cut the left. I used a 125mm thin cutting disk in my 115mm - 125mm angle grinder with the guard removed, and was able to cut completely through the bolt. A standard size 115mm disk would be just a bees doodle too small to cut all the way through I reckon and would need to be finished with a reciprocating saw. I also unseized, removed and "never seized" my toe adjustment bolts, as well as replacing my broken diff housing carrier bushes.
So the tip is to use 125mm cutting disks and you wont need a reciprocating saw.
So the tip is to use 125mm cutting disks and you wont need a reciprocating saw.