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cjbiagi wrote:I think one main difference is that the later design with the straight rod has a bolt on body bracket than can be shimmed to allow you to center the rearend. The 75 with the curved rod had a welded on body mount (or just part of the chassis) so there was no ability to adjust the rearend. The "official" GM adjustment was to bend the rod to make it longer or shorter to move the rearend one way or the other, very tricky at best. I ended up cutting off the end of the rod where it attaches to the rearend and threading it for a male Heim end, this allows me to now have a adjustable panhard bar. If you find that your rearend is centered then it is not a issue, however when you start to put on wider wheels and tires the off-center postion that is common rears its' ugly head. I used a very hgh quality teflon lined Heim end since it is a important chassis component and under a lot of stress during cornering, don't cheap out there.
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