have a set of leafsprings that came off a 70 340 Challenger - cast # on both is 3400043 - my question is are these the same as would be on a TA/AAR - thanks in advance, Joe

I just asked that last week, because I have a pair of 043's as well...

Here's the answer I got...
https://board.moparts.org/ubbthreads/show...e=1#Post6331905

ha - missed your ? Alan ! This set I got from a friend when he redid his 70 340 Challenger, thought they'd be the same as AAR/TA's - thanks

I have a set of the 043's (both sides are 6 springs)on my A66 car and they are STIFF!! I like them.

I am curious what makes these different from the TA/AAR's or the 440-6/Hemi springs that are six leaves.

IIRC, the T/A & AAR were supposed to have more arch in them.

What about the differences in the rear shock brackets?

AAR and T'A's used a unique leaf spring as mentioned above. Here is a side shop of originals showing the unique high arch. Also not they are only 4 1/2 leafs

AAR's and T/A's also used the standard "B" body lower shock mount. (also same shock mount used on 71's) THE MOUNT ON THE LEFT AS SHOWN IN THE PHOTO ABOVE
This was done because the ride height in the rear was higher (to presumably clear the factory exhaust) and allowed Chrysler to use the same legnth rear shock without having to have a special part.

part number 3400048 as shown on leaf spring

BTW there are a pair for sale in the classifieds this month