how to fix or replace bend rear radius arm.

[alchemy]

It would be nice if you said what kind of car you have. If Tim Brown is correct, any rod from 1937 to 1941 will fit. If you live in California, there are probably a dozen within a dozen miles.

I’ve straightened some on my 20 ton H press, and it surely didn’t take all 20 tons. Sneak up on it. You can probably get it back to straight.