340 overheating problem

Had a flex fan on last year only for a couple runs. Got hot but not as hot as it does now. Keep in mind it was cooler then.
At the start of this season I ran the electric set up u see now and it ran cooler. Ever since we pulled the engine and put it back in for the second time it's running hotter.
But it's hotter outside now.
Only changes when engine was pulled was a different cam