Breather Tube Routing

My 415C /C85 did not have the aluminum tubing routing the the crankcase breather to the firewall so I am installing used tubing from Vern Gregory along with
the modified breather tube with the extended copper pipe to hopefully eliminate excessive crankcase breather blow by. Does anyone have a diagram or sketch or picture of the correct installation / routing.
Also, any advice on a good A&P in central NC. ( KSIF) No luck with the names listed in the directory
Thanks
Dennis
Greensboro, NC