318 engine overheating

Thank you to all for the answers, I will try to answer.

The ignition is at an initial 10 degrees (instead of 7.5) due to the poor quality of Brazilian gasoline (with 27% ethanol). The distributor is original and is connected to an MSD 6AL, the spark and plugs are new. Apparently the color of the spark plug electrode does not indicate that the mixture is lean...
About the Jets, I increased due to ethanol, currently # 69 and # 71 (secondary mechanic)

There is a deflector on the external fan radiator fan that is original.

I'll take some pictures and send in sequence

Thank you.