white steam from breather and water tailpipe

[deuce_roadster]

I've never had problems with Best brand composite head gaskets. I have 2 cars with Edelbrock heads, 1 car with stock aluminum heads, and 2 with stock iron heads.

You may be putting too much water in the radiator and the excess is getting pushed out.

Antifreeze coming out the tailpipe is not a good sign. Are your head gaskets correct for the bore? How big is your "big bore"?