Originally Posted by Moparite
I see a lot of the radiator that doesn't have a shroud, Fan only pulls air threw a part of the radiator and not the whole thing!

His temp goes up going down the road and comes back down at idle. A shroud likely won't help that. I would however like to see a better picture of the fan. It may be restricting air flow at speed. Also radiator construction details would help. 4 rows of 1/2 or 5/8" tubes doesn't work as well as 2 rows of 1 or 1 1/4” tubes. Fin density is also relevant.

In theory, there is no difference between theory and practice. In practice, there is.