This idea was first published on the internet back in 1998 by desert truck racer Greg Foutz. This isn’t a new concept, and anyone you’ve seen post about it likely wasn’t the originator. A longer shackle will give you more travel. By flipping it over, it will lower the ride height, center of gravity, and make the truck easier to drive.
In addition you can lengthen the shackle, and it improves the handling considerably. To gain a lot of wheel travel in the rear suspension, you can flip the hanger over for the rear shackle mount and run it upside down. Whereas the Ford Ranger uses a rear shackle that rides below the hanger: The stock Chevy leaf configuration uses a rear shackle that rides above the hanger: This setup is designed to greatly increase wheel travel. Some people have done a 64-inch spring swap with a longer shackle to gain lift, but did not do a shackle flip.
Note the longer Chevy 64-Inch leaf spring versus the Ford Ranger 57-Inch (56-5/8″) leaf spring Spring manufacturers measure their springs like shown in the diagram above. You have to follow along the springs when you measure. Those that are measuring their springs at 63-Inches aren’t measuring correctly. The fullsize Chevy truck (from 1973-1999) came with either 54-Inch, 56-inch or 64-Inch leaf springs. Lets first clarify that there isn’t a 63-inch Chevy leaf spring.
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