Still A wobble or vibration

[BULKSS]

I have a 86 K30 4x4 454 stick It only has 80000 miles I really like it except for a wobble or vibration . I bought it last year and so far have Replaced Front rotors and calipers,Tie rods,drag link,Steering stabilizer ,I have also replaced the ujoints and balanced the drive shaft . The problem seems to be gone when you first get on the highway then start shakin a litle . Oh I have also replaced all tires and wheels any Ideas Thanks MIKE