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87 cutlass supreme , 350 sbc w/ 305 heads , 7.5 rear end , what size gears should i use ?

1K views 3 replies 4 participants last post by  BogiesAnnex1 
#1 ·
i have a 87 cutlass supreme 350 with 305 heads , rebuilt th 350 with shift kit in it , im changing the rear end gears and carrier over to an eaton true track posi , what size ring and pinion should i go with , thanks
 
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