the ride will be a lot better if you replace the shocks as well. It shouldn't provide any problems for you if you don't though, but just watch how much you lower it, uprated srpings are a lot stiffer than the standard ones
that will work ok . but it will be a bit bouncy cause the stranded shockers are designed to work at a different ride height and have longer dampers than an aftermarket shock ud be better with aftermarket ones