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1991 Mercury Cougar LS 5.0 in restoration
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So, I've been looking at getting 5100 vs. 4600 series for the front of my Silverado. One item to note is the 5100 is sightly more stuff than the 4600 series, but 5100 had the adjustable spring perch for ride height.

Interesting thought for sure. I see the 2wd version did not have the lower shaft like the 4wd does, but the valving may be better馃
 

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1991 Mercury Cougar LS 5.0 in restoration
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How about if the shock body happened to be small enough to slip into ours like the Bilstein insert mod. Would just have to leave an inch of the lower shaft to thread. I doubt we're that lucky.

I do have the inserts for mine, but following for future reference. F150s will be around for a while...
 

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1991 Mercury Cougar LS 5.0 in restoration
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I do like all of the different heights on the Ram shock. That lowest one looks fairly similar to our height (CA to perch)
 

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1991 Mercury Cougar LS 5.0 in restoration
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What's the distance to the spring cup mount for each level from the lower mounting hole? Not sure if anyone has the MN12 measurements.
 

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1991 Mercury Cougar LS 5.0 in restoration
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Certainly low enough...
 

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1991 Mercury Cougar LS 5.0 in restoration
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Ya, Bill is cheaper at that point. :oops:
 

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1991 Mercury Cougar LS 5.0 in restoration
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Spring rate should be more than sufficient from one of those land barges
 

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1991 Mercury Cougar LS 5.0 in restoration
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Hmm, wonder where that spring perch sits in regards to the perch to the ring land groove. Maybe the perch itself could be changed to lower the position of the spring.

Although, if it's moved too far down, the shock body will take up some of the travel. I still think the standoff cutting and welding is the best method here.
 

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1991 Mercury Cougar LS 5.0 in restoration
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What was the reason for inserts to begin with? Anyone venture a guess?

I'm assuming cheaper to make than the shock body with spring perch, but I'd think that would be minimal. I could see that being the case if the insert was used in many different applications with the shock body modified for it to fit.
 

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1991 Mercury Cougar LS 5.0 in restoration
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Doing some more searching, I see there are a decent number of koni inserts. One of interest was Saab 900. There are 4 others here. I'll have to do some searching for our dimensions and report back.

 
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