i have a '69 gmc 4x4 3/4ton with closed knuckle dana 44 front, and dana 60 rear. what axles/years would bolt in? i come to believe i cannot use same steering arm if i go higher than 4'' lift. i was hoping a 4'' lift would drop in without "rigging" it up. any thoughts would help as i would like to stay with original axles, thanx, paul