Re: 73 Apollo Rear Axle
If your rear is 8 1/2" , you should be good to go. The 8.5 is ALMOST as strong on the pinion as the fabulous 12 bolt (8.875 actual gear size). If I recall correctly, the pinion diameter are the same for the 10 bolt 8.5 and the 12 bolt 8.875. That said, I think that the Nova/ Omega/ Ventura/ Apollo rears could be either the weaker 7.5 inch or stout 8.5 inch. Easy way to ID the difference between 7.5 and 8.5 is 78.5 rears have basically 90 degree (right angle) castings at the bottom corners with round covers, while the 7.5 rears have roughly 45 to 60 degree corners with oval covers. Problem is, same as with the Chevy 12 bolt rear, they are C-clip style rears. For piece of mind, you need to have C-clip eliminators...
Last edited by steve covington; 09-21-2016 at 03:40 PM.
71 skylark convertible
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00 S10 parts getter/ junkyard dog