What is this? Need help!
 

Im putting together a crate 6.9 to replace my old one. i just installed my valley pan and intake manifold. but there is this hole above the camshaft that i thought the injection pump would seal, but doesnt. looking at my old engine the hole is completely sealed with a plug. what is the hole for and where can i find a plug?


https://cimg3.ibsrv.net/gimg/www.die...71f4927363.jpg

at the front of the valley pan above cam shaft drive gear.