225 rebuild advice

Hey guys new member and really enjoy all the input on the sight only problem is their is so much info that it gets a little confusing. I am a firm believer in the KISS (Keep It Simple Stupid) method. I currently have a 65 Dart GT with the 225 /6 with 3 spd auto tranny that was my father's last project he was working on prior to his passing 3 years ago. I will be finishing this car for my daughter first vehicle. Yes my 16 y/o daughter turned down a brand new car with all the bells and whistles for the old school. Her grandfather taught her well. I have already put disc brakes and upgraded the bushing. I am looking to rebuild the engine put a better pistons , manifold, exhaust, and carb. The car runs and drives great now but this will be an everyday driver for her so I don't need a 300hp track car but do want it to be able to get out of it's own shadow. So here is this question and keep in mind (KISS) What recommendations do you have as far as rebuilt kit's, mild to moderate cam, manifolds, and carbs 2or4? It would be nice if anyone could pm me with build sheet for what they have done with their engines. Also any recommendations changing the gears on the rear end? Thank in advance.