OK, I didnt realize you were trying to accomplish 4" of drop so with that being said, you can use S-10 arms and really just find the least expensive set you can find. I believe Jegs has good pricing on adjustable arms. The one thing you want to keep in mind is that you need good bushings in the uppers, I would suggest Del-Aluminum ones. The heat from our downpipes wear the rubber and poly ones out. Try ATS for the uppers. As far as the lowers, just get them powdercoated and install new stock bushings. The stock ones are soft enought to keep the ride nice up front. If you want to give Mark a call at Savitske Classic & Custom and see what he suggests for that much drop. You dont want to put too much strain on your BJ's by adjusting the uppers too much. He can help though, as many many people have said, HE IS THE MAN!