The ZQ8 spindles make it A BIT easier in IMO to adapt C5/early base model C6 calipers and rotors with just a adapter bracket, instead of cutting and modifiying the original spindle. I went with the ZQ8 spindles cuz i didn't want to deal with machining down the rotor and modifiying the spindle....besides the bracket still has to be bought. The issue is trying to find the spindles with good hubs.I had a hard time finding them seeing as 2wd Blazer/Jimmy aren't as popular around here....