From the research I've done reading on the site here it seems that the are not alot of good things to say about a "street driven" 4 link setup. What are the reasons?? This is not going to be a daily driver just a weekend showboat. I'm geting ready to spent uncle sams refund and want to be smart about it. I already have my donor rear end 1971 10 bolt posi. TCI kits now come with a track bar instead of panhard. what kind of lifespan would I expect with this setup??