I hope I'm dredging up an old thread I haven't found yet. I'm rebuilding a 1994 dana 60 front for my reverse shackle conversion. I've had different opinions on what ball joints and u joints to use. I currently have non servicable spicer upper and lower ball joints and spicer non serviceable u joints. Are these going to last awhile or should I purchase some greasable ones. I live in Washington in the Pacific Northwet. I'll only be using 4 wheel drive when the roads are bad and at the boat launches. Thank You for you're advice.