As I may have mentioned in your other thread, I went with DSE's Quadralink for my orange '70 Formula, and the Ridetech's 4 link (the first version) for my son's 79 TA. As you probably know, the Quadralink requires a lot of cutting and welding, and the Ridetech stuff is mostly bolt in (and less expensive). We haven't really pushed the '79 yet, so tough to make comparisons. The 70's handling is amazing...far better than I imaged it would be. As the photos show, we went under the rear end with the exhaust on both cars. Could have gone over with the DSE '70 (Pypes used to make a system for this specific application), but it is a crowded in that area with 3" pipe (and given how we ran the brake lines), and it was my HS aged son's first welding project (and he used pie cuts so it would have taken him until college graduation to finish). Things are even more crowded with Ridetech's 4-link system, essentially forcing a below the axle set up. There really isn't a downside though. In fact, one advantage is that we can remove the whole exhaust system in one piece...huge time saver to be able to remove it in 5 min. We haven't run into any ground clearance issues in those ares for either car, and both are really low. I'm getting new headers made for the 70 (to increase ground clearance), and so we'll have to redo the exhaust, and I plan on going under again.
