In my opinion, the cooler you can keep an old engine like that, the better.
I put a 6 blade fan and a '56 Buick shroud on my '56 and it stays cooler in traffic than it used to. Make sure your vacuum advance is up to snuff. Timing advance at idle helps keep the engine cool.
1956 calls for 17* advance at idle provided by the vacuum. The crap-assed replacements sold today as "correct" only advance 11*. Something to check on.