Hi,I am new to the site,been doing some reading and research.I am building a 65 galaxie for a street strip toy. I am putting together a 390 for it.Planning to use e85 as it is easy to get where I am(Holland,MI).Looking at hyperneutectic pistons in a 11 or 12 to 1 range. I'll have adjustable valvetrain . How much can be safely milled off the heads? I don't want to go any more than neccessary.Thanks.
