Upper Control Arm bolt

nodemon said

but not enough room to cut the other side..

Click to expand...

https://www.harborfreight.com/1-4-quarter-inch-rear-exhaust-air-die-grinder-52847.html

https://www.harborfreight.com/high-carbon-steel-rotary-rasp-set-10-piece-62694.html

If you have air this is a $30 solution. Good luck, however it goes.