Converting an automatic 74 Swinger to a 4 speed

Would it look stupid? That depends on you. If you do the job with duct tape, bailing wire and sheet metal screws, yeah, that'd look purdy stupid. As has been mentioned, it's not a bolt in deal. It requires good mechanical skill and some body work, since a big portion of the transmission tunnel has to be replaced. It's a big job, but absolutely doable.