The 65 a990 uses 1/2" wide belts so they are different looking. The 65 hemi cars used a thin balancer that was a hp unit and stronger than a max wedge or any other wedge motor. I saw an a990 at a car show last year and he made a big point of all the rare parts that were one his motor and I pointed out all the parts he still needed to find to make it even more correct. He did not have the correct pulleys or alt pulley. He did not like me pointing out all the things wrong with his car. I offered to sell him my original 65 race hemi balancer and he declined my offer.