[FLYNAVY30]

Did the big blocks come with any sort of fan shroud? Someone correct me if I'm wrong, but I believe the old adage is that if you're running hot while driving, you have radiator issues, but if you run hot in traffic, you have fan issues?

I know my Corvette has a shroud, and the depth the fan sticks into the shroud is very specific and has a big impact on airflow through the radiator.

If there was no shroud for the big block trucks, I would definitely start looking into an electric fan set up with shroud that covers the entire radiator. I'm running a similar set up, although mine now has an LS motor, so its not comparable.