race engine builder with many years engine building exp told me the same as above : trash the intake manifold gasket and use RTV. I just assembled two days ago. Not able to run engine yet. I do suggest you dry fit parts first check all bolts holes to make sure bolts go in easy. You do not want to find you need to clean out a bolt hole when your adhesive is on the clock! Also, if using roller rockers, check to make sure the valve covers. I have to do this. Not sure how short of starting up and crossing fingers.