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#1
02-01-2006, 04:50 AM
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Re: 12 Bolt rearend identity
70 Nova and 70 Camaro are not the same from end to end. As far as I remeber
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Rick 69 RS Camaro NOT Working on it for now!! 
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#2
02-01-2006, 04:54 AM
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Re: 12 Bolt rearend identity
They share the same center section, which is what the casting number is from. You'll have to look for other cues as to what the entire unit originally came out of. Look for a series of stamped numbers on the pass side axle tube, facing forward. There's a 2 or 3 digit letter code that will designate the original application and gear ratio.
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1969 Chevelle SS396 L78 M22 4:10 Tuxedo Black 1970 LS3 Malibu 400 BB convertible 1970 LS3 Malibu 400 BB coupe 1970 Chevelle 300 series LS3 400 BB coupe, special order Monaco Orange 1970 Chevelle Concours Estate LS3 400 BB wagon 1970 Chevelle SS396 L78 M21 3:55 Tuxedo Black
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#4
02-01-2006, 08:44 AM
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Re: 12 Bolt rearend identity
Thanks for the information fellows. I am told it was in a 71 Nova, just not sure it was original to that car. Are the external dimensions the same as for the 67-69 12 bolts for Camaro's and Nova's, if in fact it was in a Nova? The letters for the application are not readable on the tube.
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#5
02-01-2006, 05:09 PM
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Re: 12 Bolt rearend identity
The '70 Camaro rear was wider than the '69 version by about an inch and a half I believe. However, the '70-'72 Nova rears were still the same as the '69 Camaro, I don't know the measurements off hand. The code usually is sufficient, but if it's not legible - gotta get the tape measure out
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Marlin 70 Yenko Nova-350/360, 4speed M21, 4.10 Posi (Daddy's Ride) 69 SS Nova-396/375hp, 4speed M20, 3.55 Posi (Benjamin's Ride) 67 RS Camaro-327/250hp, 2speed Glide, & 3.08 Open (Danny's Ride)
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#6
02-01-2006, 06:35 PM
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Re: 12 Bolt rearend identity
The spring perches are in different locations on a 70+ camaro vrs a 70 nova. I seem to remember that 12 bolts in 71 camaros were early, then they went to the 8.5 corporate 10 bolt. I don't remember 12 bolts in 71 novas, but I expect they used any they had left over.
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#8
02-01-2006, 10:22 PM
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Re: 12 Bolt rearend identity
[ QUOTE ]
Thanks for the information fellows. I am told it was in a 71 Nova, just not sure it was original to that car. Are the external dimensions the same as for the 67-69 12 bolts for Camaro's and Nova's, if in fact it was in a Nova? The letters for the application are not readable on the tube. [/ QUOTE ] I know I did a direct swap out of a 1972 10 bolt in a 1972 Nova...and replaced it with a 12 bolt right out of a 1969 Z/28. No modifications necessary...other than I added lowering blocks 
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Bruce Choose Life-Donate!
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