Need 65 Barracuda info ** Updated **

My '65 V8 also had 9". After replacing the 7-1/4 twice, I went to the 8-3/4. Been in there since '74.

The muffler was a straight-thru type on the S with the resonator. I have a pair on mine since '74, but no one makes these anymore.

If there is rust on the floor boards, you should look at the front frame rails on top behind the shocks. There are 2 gussets that allowed dirt to build up between them resulting in that area rusting through, depending on what part of the country the car was from. I replaced both of mine.

As for the uni-body structural integrity, I think the rocker panels were the stiffening connectors between the front and rear frames. These were fabricated with three layers of steel. However, I did add frame connectors.