In my opinion they are better than the su setup I had good su's on my car, but if you tune the dgv right got to get the mixture down they are great. You will need to remove the carb spacers and get all the linkage you can up tp at least firewall you can make some of your own stuff if you want, would almost be better to have a cable setup. Just make sure the carbs are clean and in good working order, and make sure you hook up the water heat pipe the the canon intake or you will have puddling of fuel and that is no good at all. I would say if you have any smog stuff on the car and it does not need to be smogged get some plugs plug the holes from the smog stuff on the balance tube, this setup as well works good with open exhaust. but just take care and get it setup right, if you decide you can make some good money off of them. Fairly basic procedure so just have fun put it together and take your time make sure to clean everything and go get some gasket paper to make your own gaskets. Oh don't forget the throttle return spring, , and to mess with all the linkage and don't bind the linkage screws. you can get more info and redline webber website, also car will start better but is progressive so will be slightly trickier to start but not a prob, it will act more like a ferrari all through through the rev range, smooth and quick, little easier to keep in check than tripples, but those are still better. So good luck with that, and don't listen to all the negative from these people, the four bbl is a good swap out as well, but thats my opinion just one guy who plays with carbs.