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Old 06-29-2008, 03:15 PM   #1
Jcentsr6
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Lowering blocks on 67-72 trucks (coil spring truck)

What are lowering blocks?? PICS and info please..(how they work). I have read more than a fe threads that mention to use lowering blocks....but no pics. Sorry for the stupid question.
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Old 06-29-2008, 03:20 PM   #2
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

A block that goes in between the trailing arm & the rear end. essentially raises the rear end into the truck body...lowering the vehicle...
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Old 06-29-2008, 03:49 PM   #3
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

This isn't the coil spring set up but maybe you'll get the idea. This are on my S10. 3" lowering blocks.
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Old 07-07-2008, 11:32 AM   #4
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

Here is a sticky in case you want to make your own http://67-72chevytrucks.com/vboard/s...d.php?t=196457
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Old 07-07-2008, 12:19 PM   #5
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

They come in a kit with new U bolts. They go between the arms & axle. I put 2" on my 70 stepside & didn't like them. They caused vibrations & it didn't drive as good. I took them off.
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Old 07-07-2008, 01:29 PM   #6
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

lowering blocks caused vibrations? never heard that one before ...
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Old 07-07-2008, 02:23 PM   #7
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

Quote:
Originally Posted by Shane View Post
lowering blocks caused vibrations? never heard that one before ...
x2.
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Old 07-07-2008, 03:23 PM   #8
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

Quote:
Originally Posted by Shane View Post
lowering blocks caused vibrations? never heard that one before ...
x3. mine has been on for some time now and never had issues....... had mine made from a solid billet of 2.5 thick aluminum block.
nice to know people with a cnc!
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Old 07-07-2008, 03:38 PM   #9
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

Quote:
They caused vibrations & it didn't drive as good. I took them off.

Quote:
lowering blocks caused vibrations? never heard that one before ...


I supposed that it is theoretically possible to change the pinion angle enough to cause a vibration.........but I don't see how it could change how it drives?
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Old 07-07-2008, 07:00 PM   #10
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

Speaking on blocks and pinion angles and vibrations, if the pinion angle is, say, 1 degree off, will this cause these dreaded vibrations? In lowering my truck, I'll be changing the angle at the tailshaft, so want to change it at the rearend accordingly...
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Old 07-07-2008, 11:47 PM   #11
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Re: Lowering blocks on 67-72 trucks (coil spring truck)

I've done several swb coil suspension trucks w/lowering blocks & experienced no vibrations afterward. I have not done a lwb truck so I'm no help there.
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Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive.
It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar.....

Cubic inches is like Indiana Jones with a cheap pistol.
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