alot has to do with the geometry of the car - being a SWB
your choices are not good
keep the lift and spend $$$$s on new joints and spacers and arms etc to get the "best"angles on the shafts
or
take the lift out and run standard hight

my Bro-in-law years ago(early 90's) spent $$$$ on his G60 as he wanted the look of a Tonka Truck, to get rid of the shakes over 1600RPM(had a 350 Chev in it) in the end he dropped the lift & tyres, so it was drivable

cheers