The bushings will make a big improvement. Can be enough to get it stable enough to keep driving without changing springs.I bought a pack of bushings for the whole car about a couple of weeks ago. I haven’t replaced them yet.
Running 255's as well. I put split mono leaf springs on my 66. They came from Calvert Racing. No more tire rub or wheel hop. The rear is absolutely planted now.Another update. Decided to buy new leaf springs. As soon as I get them, I’m going to install them. Thanks for all the advice and Merry Christmas.