The biggest problem I had was the lower control arm bushings. Those damn things were tough as hell to replace. I had to take one of my headers off just to get to the bolts through the frame. And I used two pipe wrenches to loosen the bushing and it was not easy. But when it is done I believe it was worth it. It looks good low and handles alot better. I also went with the large sway bar from Early Classics. The only other thing that was tough was the rear spring cups where they go up through the frame I had to torch the bolts on both sides.
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1972 2wd Blazer (Project)
1969 Chevy C10 (Driver)
http://community.webshots.com/user/69chevytruck
2002 Chevy Trailblazer (Wifes)