Hello Members   Thanks to Ted E I made a tool (jig) to cut center cam bore to connect all three oil holes. Have pic but don't know how to put up. If any would like to use it you are welcome, just for freight and promise it would be returned.  Would not include 3/8 all thread or 2" cut off wheel,` that  would add  freight costs. It is small, bolts to rear main seal retainer holes in block and extents down below rear cam bore.  Cos Oregon   

For those of you who emailed me about the cam bore grooving tool I am using, here are some pictures.
 

 

 

 

Lorena, Texas (South of Waco)

So the all-thread and two lock nuts spin against the two flat washers with just a little clearance?

That’s correct. Just enough clearance to allow the spindle to turn freely.

Lorena, Texas (South of Waco)