The leaning tower of power! I had several in the same car. The bottom end just would not take any high rpm revving.
All of mine were in late 70's Dodge p/u's. My first truck I bought when I turned 16 had the LTOP and was a 5 speed manual with overdrive. All the others were three on the tree. Only one I saw mated to an automatic was a dude at work that had Dodge Dart. It actually moved pretty good. Those things took a beating.