Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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The 8.5 A-body housing has considerably more pinion support than the Pontiac nodular 8.2, while also having tapered axle bearing axles which are the best for long term life as well as cornering forces. If the '67 nodular 8.2 rear is not original to your '67, & your '67 was not factory equipped with a '67 4.33 coded rear, I'd probably shelve it, have it checked out, clean it up, then offer it up for sale to the collector that's searching for that date range nodular rear for his '67 RA or '67 optional ratio 400 HO car. Not original to your '67, getting it into the right hands would ESP be the case, if the housing is very clean, rust pock & pit free.
On the other hand, if the '67 nodular hsg has suffered the ravages of Midwest or East coast winters, lot of pock marks, rust pitting, it will take a lot of proper body work to make it presentable, & will never be a top shelf piece. In that case, if not concerned about the limitations of less pinion support & of crappy sealed axle bearing axles, you could have the nodular 8.2 built with a mid ratio Auburn posi carrier & a good used set of 3.08's. Sell off the 4.33's & the 4 pinion low ratio carrier in separate deals. Over the last 5 years, I've sold off three sets of relatively low mile original dated 4.33 gear sets. Had to slow down taking in differential work with all the other work with new home base & getting the new shop up. also have not been making club conventions, MCCAN, etc, & as a result, have not been getting connected with hardcore collectors that are actively working on 4.33 geared '69 & 70 models.
Which '71-72 8.5 A-body housing do up you have, the most common one with the squared off lug sat bottom, or the much less common style that takes a round cover?