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Old 03-24-2008, 04:08 PM
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Rear leaf spring modifications!

Is it possible to safely move the rear end backward on a leaf spring suspension? For ex. drilling new center bolts that the rear end mounts too, the bolt that holds the leaf spring together (4 leaf spring system). Or is it best to just move the mounts backward to get added wheelbase?

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Old 03-24-2008, 04:21 PM
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How far? It is a common way to center the tires in the wheel opening of a 41-48 Chevy by drilling new holes about an 1-1/2" back (IIRC) in the stock springs. I don't recommend this on the 41-48 because the stock springs are designed to only hold up the car. The torque tube prevented the rear end from twisting when accelerating or braking. With an open drive shaft, the springs control the torque, and I feel you need stouter springs for that. In your case, I am assuming you have the proper springs, you just need to adjust the wheel base. You should consider the affect this will have on the springs ability to control the rear end twisting, the spring rate, and the ride quality.
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