As these cars get older and more out of the normal replacement shock realm, choices have diminished, unfortunately. I put some Gabriel Striders on the front of our '66 Newport back in the middle 1970s. Adjusting them one notch firm worked great with the Monroe Super 500 shocks (which came from Chrysler Parts, back then) on the back. I could bound through the many dips in Lubbock, TX at 30mph with no problems. I liked that. BUT those shocks only were sold for a couple of years. I liked the adjustability of them.
In the later 1970s, I had a friend with KONIs on his '78 Z/28. Rode much better than my Delco Big Ds did. I went in that direction have not looked back. Once, while money was tight, I put some Gabriels on the front and the suspension seemed to always be moving on the smooth Interstate. Yet the same shock also showed to be for '55 Chevys and other normal cars. As soon as finances would permit, I went back to KONIs and just choked a bit at the price. YES, I'm frugal and balked, but that was temporary, considering their lifetime warranty (as long as critters don't eat the sales invoice, or the heat print fades away).
On the KONIs, tire choice matters, too. I put some Pirelli P77s on the Camaro and it rode nicer, but the KONIs lost their gutsy feel, no matter how stiff I had them adjusted. Going back to BFG Radial T/As and their stiffer sidewall got that feel back. BUT finding some KONIs for the older Chryslers now seems to be impossible. Personally, I don't see what makes QA-1s worth the money I've seen them advertised for, compared to what KONIs (for other cars) sell for.
Back in 1977, CAR AND DRIVER did a shock test on a '76 Corvette. Even showed the shock dyno resistance curves, which was interesting. Lots of differences between brands, back then. But I suspect current shocks are pretty much the same in the same price point (what you call "cheap"). So we make do with what seems to work, pretty much. Unfortunately, it's not 1968-'78 any more, fwiw.
Just my observations and experiences, your might vary,