Choosing a rear suspension

With a manual trans, it is suggested to move away from SS springs. At a certain point. At 9.50’s and quicker, they suggest something else besides SS springs.
As per the chassis book, but of course, this isn’t saying it can’t be done with leaf springs. I believe they think it better and easier to go away from the SS springs at a certain point. And while probably true, your wallet may argue or you may just want to try the springs anyway.

View attachment 1715126141
Actually by the time you add up the cost of SS springs, shocks and the other upgrades such as extra clamps, shackles etc, it's not much more these days to just jump into a 4 link, granted there's much more work involved.