[DAVID GAGNARD]

Clois;

Your electric fan is defanitely too small.I had the same basic problem with my 351-W in my 65 Fastback. My cure was to go back to stock type pulleys,and a larger ????electric fan in the rear (got off a wrecked Caddy I think) and a 1000cfm pusher in the front. Checked with one of the companys that make high volume aluminum water pumps and they recommended that your water pump and crank pulleys be at least the same diameter if you are having heating problems. I also run a 19x26 aluminum radiator. With the under drive pulleys she still ran hot in parades,when I took off the crank pulley and put back on the stock one she now runs 180-190 in parades and 180 on the highway no matter the outside temp. I'm running a 180 thermostat....On the highway the electric fans never come on as long as I'm moving 30 mph or more.Just the air flow is enough to keep the temp at 180...

I would go to a stock size crank pulley and a better electric fan,at least 1400 cfm as minimum and possible a 12-14 inch diameter pusher in front for added help.

Do not know what size radiator you have but I would say a 19 x 26 as minimum also.

Hope this helps.......

David