no the carrier is different, but the '66 ring and pinion will work for 67-70 rears, if you will part with just the gears?
looks like we need to clarify: what is the gear ratio of the 66 rear on ebay as i didn't see one listed there? and what is the gear ratio of the 70 riv you are parting out? i'm looking for some 3.23's or 3.42's...