I have the 8/7k swifts on my 2575lb car and love them, the regular version of the coilovers.
I had to remove one rear locking collar and spin the other all the way down to get the car low enough, not even close to slammed which I never ever do as know better, getting the lower version of the BC's is a good idea it seems then adjust to the best height for your needs
On the front I was able to get low enough and still have about 3/16" more thread left on the barrels but actually might be just a bit lower than planned once it settled, I am going to measure the inner and outer pick up points and bring the front up a bit if needed to have the best geometry/height combination.