macsFX4

i need help with my setup to make sure its going to work.. i cant decide what rims will work with a 6in bds beacuse im trying to fit 37s and their website claims it can be done with a 20x9 5.5 in of backspacing.. but i want to go with 22x9.5 and the rims im looking at are fuel hostage and their backspacings are 4.50, 5, 5.5, 6 but 4.50 is out of the question cuz that will look retarted "stick out to far" id prefer 6 to be honest i dunno if it will work.. i think the factory FX4 rims are 20x8.5 6in of backspacing. also i plan on putting camburgs UCA and they call for 5in backspacing but someone told me when u have a 6in lift u dont have to worry beacuse ur UCA is above ur tire anyway.. thats only for stock ride height and leveled u have to worry about