What Differential Do You Have in Your 1965 Barracuda?

YY1 said

Actually 741 was used in 66 B body cars as well.

742 was an interim design from about 1969 to IIRC early 1970.

Then the 489 came in.

WAY more 742 and 489 cases made than 742.

Click to expand...

My 67 Hemi Charger (automatic) came with an 8 3/4 rear with a 742 chunk.

The rear in my 64 Polara convertible when I got it was a tapered-axle 8 3/4. It had a 742 chunk with 2.76 gears. But I have to say that was probably not the original chunk because a 383 4-barrel Polara in 64 would have had 3.23 gears standard. (It has a 66 Charger 8 3/4 rear in it now, with the original 3.23 sure grip 742 chunk out of my 67 Charger.)