[sweetk30]

5x5 bolt pattern = 1/2 ton 2wd
6x5.5 bolt pattern = newer stuff and 4wd in the square body stuff .

there is NOT the correct room to do this unless you change the whole center out basically .

and to know ANY rims offset / backspace its simple and easy .

rim laying flat on its face ( put towel / cardboard down to protect the face first tho ) and then straight edge on the rim its self were the wheel weights clip . then measure up from the lug nut seat face were the rim touches the rotor or drum to the straight edge . and there you go you now know backspace / offset .

crazy i dea i have always had is maybe use 6 lug 2wd rotors ment for older 67-72 type stuff on the front and a set of 6 lug axles and drums on the rear to make a 2wd a 6 lug combo .