1970 Dart Swinger - father and son project

Hey ALl - Been a while since I been on here, distracted by life and all. We are at the point where we are ready to think drive train. We have a rebuildable 340 and all the components to install a 4 speed drive train. We are looking at the engine and thinking of options for lifters besides the factory flat tappet. Is there a roller lifter product available which I can install directly into a 1970 340 or do I need to modify it to make these work? I am hopeful that many of you have looked at this and can save me a great deal of effort. Please let em know and thanks in advice for your assistance.