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Discussion Starter · #1 ·
Im sure this is posted somewhere but i suck at searching so thought i would re ask here. whats the length of each year rear end. are the spring perches in the same locatio. thanks jerry
 

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65-66 = 57.25
67-70 = 59.25
I don't know about the perches.
 

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While the spring perches are in the same position, the 65/66 axle tube's dia. is smaller than the 67-up axle tube dia at the spring perch position. The 67-up requires larger U-bolts (2 7/8" vrs 2 1/4") and associated (or modified) shock plates.
 
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