[Kube]

I am firmly in the camp that one does not need overflow gadgets, high pressure caps nor high volume pumps to allow your engine to cool properly.

While I have a deep respect for the rebuilding that George "Skip" Haney does, I've yet to see any difference made on a "good " engine. I have little doubt that if the engine block is not clean and perhaps the radiator plugged to a degree, his high volume pumps along with "gadgets" may aid in masking the real issues.

As it sounds like your engine, etc. is "good" I would suggest getting your radiator cored. I've have heard the "reasonably priced" aluminum radiators are "reasonably decent" in quality.
So, if "decent" is what you are happy with, go for it.
Otherwise, spend a few hundred dollars more and get the best quality available. IE: either Brassworks or a quality (re)core.
I have my 39 - 40 radiators cored near me at a cost of about $500. Not cheap necessarily, but they are beautiful, correct and very dependable.