It all depends on the style you are going for. IMO, you need to settle on the finished look and build the car using it as a model. Do you want to make it a retro-60's look? Modern smoothie with billet and no door handles? Lowered 50's custom with fender skirts? There are so many choices, and each will help dictate the type of power you use. I would do a search for '41 Ford builds and determine what you like and go from there. We will be more than happy to provide our own two cents worth!