Oil Priming on a 340

Rapid Robert said
turn the crank to 90 degrees (1/4 turn) BTDC #1 compression (there might be partial slits on the dampener to help with this or cut a strip of newspaper 5.694" to use as a ruler) & preoil then turn to 20 degrees ATDC #6 compression & preoil again then go to your desired initial amt before TDC #1 compression.

This is the process I use - right side/left side. I also windowed a stamped valve cover so I can see the Oil flowing to the top end, but not down the side of the block.