Requesting cooling/radiator/fan help for a slant six

FWIW. I cruised Woodward Saturday in my 64 225 Valiant. Not sure what the temp was in the afternoon but probably in the low 80s. A few hours of bumper-to-bumper traffic, like 35 mins to go one mile. Maybe I'm whistling past the graveyard, but the original temp gauge barely got to the first mark. Also endured about 3-1/2 hrs each way at Interstate speeds. Saw a few cars puking coolant but no Mopars.

Slightly warmed up rebuilt 225 +.040, 3-on-the-tree, fuel line mod, Oregon cam, .080 off the head, original radiator and 4 blade steel fan, new replacement water pump, cast iron exhaust manifold.

Never skipped a beat. If it ain't broke......