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leaf spring compatibility
#2675513
07/08/19 12:31 PM
07/08/19 12:31 PM
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Joined: Feb 2012
Posts: 137
midwest - USA
69/70 Plymies
OP
member
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OP
member
Joined: Feb 2012
Posts: 137
midwest - USA
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Need to know if a pair of factory HD leaf springs from a 1972 'Cuda will fit a 1969 Road Runner? ( Bolt hole-to-bolt hole length). Thanks for the help.
Last edited by 69/70 Plymies; 07/08/19 12:35 PM. Reason: clarity
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Re: leaf spring compatibility
[Re: topside]
#2675776
07/08/19 10:49 PM
07/08/19 10:49 PM
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Joined: Oct 2006
Posts: 1,264
New York, USA
Chargerfan68
pro stock
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pro stock
Joined: Oct 2006
Posts: 1,264
New York, USA
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Both have a 22" front spring section (center pin to center of front spring eye).
E-body rear section (center pin to center of rear spring eye) is 35", that era B is 36".
The shorter rear section will cause the rear shackles to either be vertical or point forward at the bottom.
Not a problem for rolling around the shop, but the springs will not work properly and the car should not be driven that way.
Using an extended front mount in the OP's scenario will move the center pin back, which moves the axle back (and the driveshaft @ ft yoke/trans).
Those front mounts are typically for using the 20" ft section SS springs in cars that have 21" or 22" section stock. Good information and explaination. I agree from what i’ve learned over the years. 
1.50 60Ft. , 10.75@ 127MPH Hauling 3900 LBS.
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