Lowering an 84 GMC.

[69heavychevy]

I agree on staying away from the DJM flip kit. The quality didn't seem very good so I ended up going with a 5" western chassis flip kit. The DJM kit is now sitting on the spare parts bin. I did use the shock extenders from the DJM kit which as mentioned before don't fit very well, but I made them work.
For the front I did use DJM 3" spindles which surprisingly were actually good quality in my opinion. The tolerance for the caliper mounting was so tight that the caliper wouldn't go on if not perfectly aligned. I also cut 1 coil off the front stock springs.
The only clearance issues I had was with the inner wheel weights on my aftermarket 15" rims. I was using sticky weights and wouldn't clear the caliper mount. Regular snap in weights worked fine.