rear axle spring perch width: K5 v. K30 - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 01-20-2007, 04:41 PM   #1 (permalink)
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rear axle spring perch width: K5 v. K30

I can't go measure my K5's rear spring perch width, since it's snowed in, but what, if any, is the difference between the K30 and the K5 perches??? 14 bolt is still in the garage so if I need to move the perches I'd rather do it now.

Thanks ladies.
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Old 01-20-2007, 04:50 PM   #2 (permalink)
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They're both 42", just went and measured them.
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Old 01-20-2007, 05:03 PM   #3 (permalink)
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Should be a dirrect bolt in with the only change needing to be the u-joint at the d-shaft. They make a conversion joint i dont have a number but being in Utah, you have a six states distributor there and they have all the spicer part numbers.
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Old 01-21-2007, 03:43 AM   #4 (permalink)
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If both are '73 - '87 vintage, the Blazer will have a considerably wider spring spacing than the K30.
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Old 01-21-2007, 09:57 AM   #5 (permalink)
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k30's had a 40 1/2" center to center, along with 1st gen blazers, but 73-87 were 42" on the 1/2 and 3/4 tons
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Old 01-21-2007, 10:06 AM   #6 (permalink)
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damn, forgot to put the years again:

Blazer is an 89, axle is 85-86ish? out of a CUCV. Guess I'd better break out the shovel and the snowpants LOL

Thanks guys!
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Old 01-21-2007, 06:40 PM   #7 (permalink)
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I have an '85 K30 14FF - so would that be 40.5" center to center - correct?

What is the center to center on a 1989 1/2ton Burb? - if you happen to know that would be appreciated. The Burb is buried in the snow also until spring (and 30 miles away from my house).

I'm just ordered these spring perches:
http://www.ruffstuffspecialties.com/...ring-p-63.html
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Old 01-21-2007, 06:52 PM   #8 (permalink)
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Quote:
Originally Posted by Blazed_bowtie View Post
k30's had a 40 1/2" center to center, along with 1st gen blazers, but 73-87 were 42" on the 1/2 and 3/4 tons
Agreed.

~2" difference, and the shocks are inboard vs. outboard.
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