340 with edelbrock heads overheating

My 340 in my 64 dart overheats also and nothing but an electric fan helped.

By the way lowering the temp of your thermostat doesn't increase the cooling ability of your system. if it is overheating with an 180 then it will overheat with a 160.
yeah i know i had a 160 in there before the engine rebuild. Because of covid could not get another 160 for a few weeks and i had a 180 on hand . I was going to change to the 160 anyways so thought i would do it now in case the was the problem. Nope, not so lucky