ok when u look down at the box there is an aluminum circle that is either held in with a c clip, or has 4 bolts at each corner, i know circles dont have corners. but if u have them u will see them. if the box has the c clip the diameters of the pitman arm is different. if they have the bolts everything should work. i got my pitman arm at a junkyard but that was in the 90's and i got the puller from autozone.
generally stock malibus ive seen have the clip set up.
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1987 Aerocoupe - stock 1985 SS rebuilt LT1 rebuilt 4L60e rebuilt 3.42 posi handling brake upgrades too much rebuilding not enuff mileage!
one more thing i just want to add. if u are planning to keep the same size rims get the SS box but if u go larger in diameter on the rims think of the iroc box. the stops are different and ur rims have a smaller chance of rubbing the inner fender wells.
good luck on ur swap!
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1987 Aerocoupe - stock 1985 SS rebuilt LT1 rebuilt 4L60e rebuilt 3.42 posi handling brake upgrades too much rebuilding not enuff mileage!