Thanks for your help 6cylinders. I will give that a try. I have a plastic overflow tank, but did not want to change too much as my truck is all original except for the 235. I am looking for something more period. I will try the small hole in the thermo tonight. It was cold here yesterday and I dont have a garage. Thanks again!!

Ralph


rtlopez@shipleysystems.com
48 Chevy 3600 w/235
48 Chevy 3100 w/235:
You cant see the smoke on a dirt road.