Hello - assembling a 351E engine freshly overhauled - ordered a gasket set from Olsen's for it. What is your honest opinion on using silicone sealant on the intake gaskets and high heat silicone on the steel exhaust manifolds gaskets? This engine is for my 1965 GMC Suburban which I have owned for going on thirty years and will keep till they pry my cold dead hands off the steering wheel. Thanks, Cliff