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the ones w/ the 4 big pistons are the v6 version, correct? do they brake a lot better than the other ones?


the V6 version has four equal size(larger) pistons. they provide greater clamping force on the rotor. you may want to change you master cyl to the larger 1" bore(also from V6) to give the pedal a firmer feel.

I'm running V6 calipers on my '85 with rear disk w/ small calipers(grand prix) along with a V6 booster/ master cyl. the pedal feels about the same as it did with stock brakes. but the truck definatley stops much better and I running 35" tires.............Karl