BigSwede said:Probably 912s or 919s, 929s are probably a bit much.
912s are a little stiffer than stock but ride very nice and are great for a DD. 919s are rated for +220 lb load, and 929s are +440 lbs. 929s are great for expedition vehicles with lots of extra stuff loaded on, 919s are a good compromise between the two. Both 919s and 929s will give you closer to 2" of lift, versus 1" for the 912s.
BigSwede said:Your 89 RS has rear leaf springs, so that info is not gonna work for you...I believe OME does make replacement leaf springs too though.