in traffic it will stay around 180, expressway it will slowly creap to 190 - 195 never took it on the expressway for more than about 30 min so don't know how hi it will climb. it a 360 with 11.0 cr blocked heat risers single plane, j heads, 14 initial, 33 total msd ignition no vacuum advance, tti headers 2 1/2" exhaust, jetting looks good already played with timing and jetting with no diff, has 4 core 22" stock style rad thats clean, has stock shroud, 5 blade mopar 18.5" clutch fan out of 70's car, stock replacement water pump, belts tight, 160 t-stat, had 180 hi flow same problem. ??? I have a 7 blade "215" fan thats for my demon will this make a diff, even though my problem seems to be at 65 MPH?