5.7 Hemi in a Duster

Im gonna go with a stock truck 5.7 in my 64 dart convertible. Im even gonna go with the factory computer. I found a shop that has a gas tank with the pump inside that matches the shape of the gas tank from darts. I havent got my hot rod magazine yet, but i cant wait to see the artical, that said a t56 6 speed is a bigger tranny then the tko 5 speed, and requires some skill to get it in. If you want to save a little, you could keep your automatic. it will bolt up to a new hemi. I just want a 5 speed so my car will feel abit like a lil sports car. Im not sure why they went with catalytic converters, unless there is some silly law out on the west coast? Maybe they want to "go green" with this car, not only will it go fast, but itll save the planet while doing it. :-)
i usually get my magazine way before this, i hope they didnt forget me. :???: