My transom (1978-mercruiser) shield does not have the access plugs to get to the bolt on the steering arm. My manual says you can drill holes and plug them to get access to them. Has anyone done this? Where do I get the parts to do this? My motor is out and I still cannot get anything on the bolt to tighten it so I believe this is my only alternative. Maybe just pull the whole transon shield? Is this hard?