74ish-77 waggy
FR: pass. side drop, small bearing easy change over to 5 x 5.5, flat top knuckles
RR: offset rear, quadra-trac.
78-79 waggy
FR: pass. side drop, big bearing
RR: offset rear, quadra-trac.
80-up
FR: driver side drop, believe early '80s had the vac disconnect
RR: centered, early...