There's one video where the guy had a seized tensioner, wouldn't budge. He used some blocks of wood and the weight of the car to free it up. Creative.
I don't have an impact wrench, only minimal hand tools. My lug nuts were so tight the short tire iron was not enough leverage. I went to the hardware store and bought a 3 foot black iron pipe. Used that as a cheater bar on the tire iron and finally got the lug nuts loose.
About the 3rd time I took the wheel off, one of the nuts didn't want to move. Even with the cheater bar it was hard. By the time I got the nut off, it was hot enough to burn my hand. The threads in the nut and bolt got damaged somehow. Maybe some dirt got in there the previous time I put it on. I filed the bolt threads down enough to get the nut back on, but it needed replacing. I didn't have the tools for that, so I took it to a shop. They replaced the bolt and nut while doing a brake job.
Beware that unexpected problems can arise with an old car.