Big block cooling question

yellow rose said
The pump is going WAY too slow. The water pump should be driven at 1:1 at the slowest.

I have the same issues, but not as bad. I have the same size pulleys on both the crank and the water pump. A hair bigger crank pulley would speed the water pump up a bit. I`d like to have a single groove 7" pulley for the crank to try.