You can always trim the rears to suit as well. I purchase new Moogs & trim them to the height I want.
Even after cutting the pigtails off, they still have an area to 'seat' @ the top (it's just a larger OD vs the pigtail). Of course, if the rear fully extends beyond the springs height, they can fall out but that can also happen w/the stock springs. A shorter spring just means it can happen sooner. If paranoia exists over the shorter spring, you can always source a limiting strap to prevent over extension but the shock length usually does the job.