Rick, I for one agree with your decision to use less than pristine external parts on your rebuild. 50 year old cars have obtained a degree of patina that can’t be recreated. A bright shiny engine looks great on a concours restoration but out of place on an original car. As long as you antiseptically clean the internal parts and degrease the external’s it will look just right on your car. When I tore the engine down on my mostly original low mileage 69s I really had to fight the urge to use my bead blaster and buffer. In fact, I spent way more time using elbow grease to clean the Porsche motor than I did using said equipment on my Frame off restoration of my Datsun. It was the right choice for each car. Both engines are 100% clean and both look proper for the car.