Here is the link to the thread that gives more detail on the spacer that allows the rear valley cover hole threaded post to be retained.

http://forums.y-blocksforever.com/FindPost152554.aspx  

  

Lorena, Texas (South of Waco)

Ted,
Looks like something CASCO could easily manufacture & (likely should) include with their PCV kits (?). Just seems so obvious (plastic/3-D printer?).

6 VOLTS/POS. GRD. NW INDIANA

Not much to make one. Short piece of exhaust tubing and 2 washers. The lower could be a fender washer with extra holes or a 3/8” wide strap with a 3/16” hole for the screw. Having the stock pickup PCV tower and having the valve at the carb is always an option. This one I had to notch to miss the dual quad manifold. The welding was oxy/act. 

56 Vic, B'Ville 200 MPH Club Member, So Cal.