i have 2 devilles, one is a gorgeous dhs with the fully loaded interior (rear shades, vanity, massaging seat, etc) but has a salvage title. now i have a dts with a beat up interior and engine., and im planning to swap the dhs interior into the dts along with the motor. so my question is how hard is it to swap out the whole interior without breaking anything? how long should it take? from the front dash to headliner and rear deck...also since my dts doesnt have any of these features will it be possible to make everything connect?