Block is front oiled for sure. And yes I too see the jumper feed to the rocker passages.
Not sure what that smaller line is. Maybe oil pressure gauge. Or spring oilers.
I was going to front oil my block that way until I was shown that the X block has an external
Bung so I decided to front oil externally. It is reassuring for me to see some of the same mods that I have done on another motor..
Especially the front oil mod which I got from the Sanborn thread.
Love that dual pickup. Never seen it done that way.
