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TR2/3/3A TR3 vs TR3A vs TR3B

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billspohn said:
What is the exact difference in length? (I probably used to know this, but it has long since gone into the dead storage area of my memory bank).
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I've not measured it accurately, but it's around 3/8" to 1/4". You're right, you can strain the mounts that far (especially if they are a bit older), which is what I did on my first conversion as well. But I always had a hard time keeping mounts in that car, and I think the length difference is one of the reasons why. When I did it again, I elongated the holes in the rear cross member by about 1/4", so the mount lined up, and never had another mount failure.
 
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