I had cooling issues with my 69 400 and it was several things that added up to make a difference. I replaced the radiator, replaced the water pump (stamped impeller to cast), added lower valance panel to block hot air, and added a foam gasket to fill the gap around the radiator to block hot air. I also tested a bunch of fans to find the one that worked best (ended up being a flex fan). Each one of these things decreased the temp by a few degrees. If it were me I would add a temp gauge so that you can see the temp while you drive.
|