Small Block Cam Thrust Plate Oil Drip Tray & Bolt

C correct but you got to have it for that drip rail that's how the oil comes out the drip on it
Never saw a 340 with a drip plate. The drip plate came later. Every 340 and HP 360 I saw had the bolt with the hole through the center. My time line was only through the mid 70's. Too busy doing other things after that.