On my sidedraft, 151, this way: from the Tee thru between the cylinders, to mech. gage under dash. Was already installed on car. Assume correct, seems to work OK~~~
EDIT: the valve oiler is blocked off. Yes, I will get a lower pressure gage !!
Sidenote: have always wondered if oil dipstick, as seen, is suppose to have a wood or plastic handle on it?