Dtret Posted June 7, 2020 Share Posted June 7, 2020 I am new so sorry if I am in the wrong place. Rear diff code RUC 223 (A)this (A)could be a scratch I think. Julian date of 223 (August 11) but the question is. Of what year. Trim tag says 09B. September second week. Last 6 of vin is 110865. So it’s the 10865 Monte off the assembly line. If I am guessing correct the car was built in September of 70. So the Julian date should be for 1970 even though it was built for a 71. What do you think? Quote Link to comment Share on other sites More sharing options...
Paul Bell Posted June 7, 2020 Share Posted June 7, 2020 For a 1971 car, "RU" indicates 3.31 12 bolt, 454 LS5 car. "C" is Buffalo, N.Y. build. And yes, 8/11 "223" is the 223rd day of the year 1970. http://chevellestuff.net/1971/rear_axle.htm Quote Link to comment Share on other sites More sharing options...
Dtret Posted June 7, 2020 Author Share Posted June 7, 2020 Thanks. I just wanted to clarify. More I guess to make sure the Rearend wasn’t replaced in late 71 Quote Link to comment Share on other sites More sharing options...
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