I find myself keeping an eye open for a 4G63 DOHC cylinder head...anyone know if it matters if it's from a 6 bolt or 7 bolt engine? I know there's a difference in the intake ports and head bolt sizes. I think the 7 bolt heads have to have their head bolt passages bored out 1mm to fit on a 6bolt block. No idea about on a G63B block. And Project Zero G seems fairly dead these days, waiting on an account to be approved.