LA318 Edelbrock Magnum v RHS LAX Heads

I fitted the RHS heads from Brian to my 340 and the change in the motor is really noticeable and I was very impressed. They came ready to fit with no extra checking/machining required. I measured up and just bolted them on. Runs really strong. I think it would be a shame to get good heads and then mill them to the point they could not be used on a 340/360 or even a 318 stroker at a later date even if the OP does not have that in mind currently.
I've read that they have improved water cooling and I have notice my motor does run colder than before with just the head change. Just something extra to consider.