Long day. I got the mount built anyway. I won;t have to even undo any part of the vent line. I cut off those mounts and welded them to the new pump mount. It goes in there fine. I'll have to search that oil pressure switch. I think all I need now is to work out which is the supply and which the return in the engine bay I'm pretty sure I can do that Then get some wire connectors and run a wire. I'll take suggestions on the path to run the wire please. Here is a picture of the mount.
new pump mount.jpg