Oil Pick up tube

Looks like a Milodon small block. But you'll have to determine the part # based on the sump depth of the pan being used. If the pan is not Milodon, you'll have to do some careful measuring as they have 5 qt. (OEM), 7 qt. & 8 qt. pans with center (front) sumps & check internal clearances.

At Summit look up Milodon pans for 340 or 360 then compare the depth measurements to your pan. Double-check the measurement from the oil pan rail on the block to the bottom of your pick-up tube as well.