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Old 05-30-2006, 06:50 AM
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As stated above the 12 bolt gears won't fit. FYI, your '73 has the 8.5" Corporate 10-Bolt, it is plenty strong. Posi's and gears are fairly easy to find, if you buy a new set 4.11's are about the cheapest ratio there is for the 8.5". I'd stick with 3.73's myself but that's just me. The factory 2.73 and lower (higher numerically) carriers can take the 4.11 without a spacer or special ring gear. Any '73-'88 28 spline 8.5" posi will swap into your axle housing. The '71-up Camaro, Firebird and Nova also carried 8.5" rearends and some of the B-O-P A-bodies as well.
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