225 running a bit warm!!!

Wow thanks guys lots of ideas I am going to try some of them this weekend!!! My motor is a 1971 225 so there is no egr valve, I dont know if anyones been inside the motor to bore it out but could be I didnt think of it being bored with thinner cylinder walls. It is forty years old so anything is possible I guess!!! oh hey one more thing I have a none clutch solid steel race 17inch 6 blade fan with no shroud would that do it?