I have a 1999 f350 7.3l crew cab dually. I do want to raise the front end a bit to give the truck a little more character. I was wondering if it is better to do the shackle upgrade or the do the add springs. please drop your thoughts or even someting else i don;t know of? also i am thinking of adding a plow to this truck how would this be affected. Thank you all for responding. Pat