Another 400 build thread

Correct me if I am wrong, but aren't aluminum heads on a low compression motor a poor choice?? The thermal properties in effect lower the compression by reducing the heat.

"Aluminum heads dissipate (get rid of) heat much faster than iron heads. The rapid heat loss from the combustion chamber results in reduced combustion chamber pressures (heat equals pressure); similar to the effect that lowering the compression ratio which lowers cylinder pressure. When switching to aluminum heads you MUST raise the compression ratio to prevent a power loss."

"Aluminum heads will not automatically create more power than iron heads unless they flow more air and are installed on a higher compression ratio engine."

I was told by hughes over phone when discussing my 78 slogger 440 not to go with aluminum heads if not increasing compression by at least a point.