Thanx for the comments, it only gets hot when I'm in heavy traffic or on the interstate, & if I turn the heater on it'll get around 195, without the heater 200+. The radiator was checked, it's clean, napa #6 stat. The block was cleaned when the engine was built. It has the original water pump?, and I've checked it with a temp gun at the sensor and it's close.

       

Gary, 55 Vicky, St. Germain, Wisconsin

 

I’m in total agreement with John.  The steam holes are not for additional cooling but were provided to solve a problem with air being trapped in the block when the coolant levels got low.  I go out of my way using blocks and heads that do not have steam holes as they are inheritently stronger and less prone to cracking.

Boiling the water out?  If not then double check the gauge for reading correctly.

Lorena, Texas (South of Waco)

Don't expect the steam vents to fix it.  There's something else wrong with the cooling system that needs fixed.  They didn't overheat when they were new.  No steam vents and no 6 blade fans.

John - "The Hoosier Hurricane"

Is there enough of a gain with a 6 blade over a 4 blade fan? I thought I saw on here where to get the smaller pully and spacer. I'm doing everything I can to help cool the car down before I have to pull the heads and drill in the steam vents.  Thanx

       

Gary, 55 Vicky, St. Germain, Wisconsin