You're looking at changing the front spindles (I'm assuming you are changine to front disks), balljoints, tie rod ends, all using '73-'87 parts, then out back, there's 2 options; 1; modify a '71-'72 axle housing to fit the trailing arms and panhard rod, or 2; swap shortened (approx 1", I think) '71-'76 12 bolt axles into the existing housing, plus 5 lug drums. This will change it to a 5x5 bolt pattern, common to Chevy/GMC truck '71-'98, Police/Taxi/SS Impala '88-'96, and possibly other GM full size cars from the '70s.
