My 88 tbird rear works just fine with 245 45 17's...you may even be able to use sn95 axles if you want 5 lug or aftermarket axles in the future...they are 3/4 inch longer vs. 5/8 inch longer for the t bird axles. Don't quote me though!
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88LX notch, Speedpro EFI Procharged!