[bobt427]

I seen a show on speed channel some time back they showed the use of hardblock. It was in a chevy 350 I think. They filled it up to the top of the frost plug holes,and said it shouldn't have any cooling problems because all the heat is made in the heads.
Wes Adams said he was only going to hardblock his engine to the bottom of the frost plug holes,and from what I can see in the pic's about 1/2 inch.