There is a ranger that is done here
http://www.lowdowncustom.com/ldc.html and it works pretty well, about as well as you can get it with I-beams. I'm doing a F150 now and putting in a front chevy 1500 front frame clip under it, its deffinatly the way to go. Just depends on what your ultimate goal of the truck. Daily driving, definatly switch out the front unless u got big balla money for tires all the time. haha