head gasket replacement

[Mr. Spool]

I resently purchased a turbo kit for my 95 240 and was told by him that I had to replace my stock head gasket with a solid copper one to run 5-8, pounds of boost. I have never seen any mention of this before and ran a complete search and still found nothing. so my question, is this true. and would there be any benifits to it. any imput would be apreceated.

by the way mine stock one is still good.