Hi all.  This is my first post and hope the members can help me.  I am working on a 368 inch Y block from a 1957 Mercury Turnpike cruiser.  I have read that the hydraulic lifters from the FE 390 engine will also work in my project.  Can anyone confirm this?  

On the front of the camshaft there is a sleeve that spins  on the fuel pump eccentric to push the pushrod.  Its about 3 inches in diameter.  The one I have is very pitted with rust on the outside and I have not been able to find a replacement.  Any source for this or is it used on any other engines from Ford? 

My last question is about the 2 brass plugs that close off the oil galleries at the front in the timing cover area.  The machine shop destroyed them taking them out and didn't same the pieces.  I think that these plugs have an oil hole in them to lubricate the timing chain.  Can anyone confirm these holes and/or the hole diameter?  Were both plugs drilled?  Does anyone know of a source of these?   Were these used on the 312?