the Oilhole between Pump and Gallerie is at my Block the correct ID for cut in careful a (Metric)M 16 Thread without predrilling. For the Plug i use a schortend (0.5 Inch long)M 16 Screw with a cut in, to turn it in with a Screwdriver. the plug is saved with Loctite Blue for Threads .I have it
all drilled with hand,the outside Extra Holes to. but the Engine was disassembled and dry for complete clean out all Lines after drilling.
For the setting the Plug You must meassure how deep is the beginning of the Maingallerie,thats the End from Your M 16 thread. And
under the installed Plug You drill the Outsidecomming Fitting.
Thats my Version
Is it OK,Buick Guy ?
'38 Special Coupe
LIFTERS CC GERMANY