Mopar made templates and there’s plenty of videos about unshrouding the valves, port matching etc.. There’s plenty of power to be gained just by cleaning up under the valves and port matching and using 2.02 valves. Maybe you’re a person who just can’t do it for whatever reason, drop the bucks those heads are for you but for me my background was building a car and bringing up my family comprised had to happen in-fact doing heads came from need because there wasn’t anything better. If you wanted to make power you had to build your own. I’ve never trashed a head but I’ve known people who have, I’ve been lucky to have been given advice and smart enough to listen.
But if a body and paint guy can build a 650 hp iron headed 440 and have it live for years I don’t know why you can’t work over a set of small block heads. Just start by unshrouding and port matching, no water involved.