It will much eaiser to find & install a 3.00 carrier in your Grand Am then it would be to just ad the spacer along with the rear end. You can use the center section from any A or F body cars that have the posi-trac rear. I always say put in new bearings when you switch the center section from one unit to the next. One thing you need to get a center section from any 73-81 F-body & from the A-body use the center section from any 73 -77. They will go right in with no problem. And because there are so many F-bodies out there you can find them very easy.
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