Lower control arm outer bushing shell removal frustration...

One shade-tree tool is a length of all-thread, a short length of pipe, and a thick stack of washers. (Use your imagination.) But that only (usually) works from a clean start. The right tool to remove the outer bushing shell by itself is a 'muffler tool'.

(A 'muffler tool' cuts open old tailpipes to install new mufflers. It looks like a chisel at a steep angle. An automotive tool store will have one. Not pricey.)

Three caveats: 1. Keep torches the hell away from lower control arm ends! These are high-strength steel. They support the whole front end. Don't chew them up or kill the temper, or you get to rustle up new ones.
2. Some urethane bushings are sized to fit inside the old outer shell. (They figured you couldn't get it out anyway, so why not.) Did you read their directions?
3. Once you get the old muthahs out, you're only halfway. The new ones have to go in, just as tight. I've done a few of these, but only with a serious hydraulic press, the one we use to push out big-block piston pins. Make a friend somewhere.