Mike, the decisions on the rebuild were made so long ago, but the only mods I made were to have the conn rods polished and shot peened (you know, why not) but then for spec only went with a more aggressive hydraulic camshaft. That requires modifying the heads for an adjustable rocker setup, so screw-in studs and guide plates. Pretty ordinary work for an engine shop. Since the original cam was the same thing probably used in station wagons (and since the heads are closed chamber and have healthy compression ratio, friendly to more cam already).
A stroker kit and a roller cam would be a super nice setup--but in the big picture, completely unnecessary and (expecting that the core of your engine is healthy), just the minimum bore with new rings and balancing will keep you happy.
In the meanwhile, great time to scrub up and DP90 the frame...If you want to re-install the water valves, you might trace the brackets on my car and the valves are easy to find. Boots for the heim joints, finding some modern replacement for the asbestos heat shields up front, new rubber hoses everywhere--are a nice gift for a 53 year old car...Lee