there is a small tin piece attatched to one of the cam plate bolts , it is the drip guide for the chain. Oil from the front cam bearing runs onto that then onto the chain . IIRC there should only be 3 outta those 4 bolts used , and a tab off that tin plate goes into the 4th hole to keep it from turning out of place . plate groove faces engine . on a P/C I click on photo and it enlarges enough to see .

 

A '68 engine will only have the bolt with the hole in it, not a drip tab.

 

Thanks for the replies guys. I hope you could understand my confusion. I was under the impression that I needed the drilled bolt and the drip tab. I thought that the oil came out of the hole in the bolt, dripped onto the tab which in turn dripped on the timing chain. What about the missing oil slinger?

 

Every engine should have a slinger, though it is usually left out for some reason.  It will keep oil from building up at the front seal and prolong it's life.

 

Thanks Elwenil, that's what I thought the slinger was for. I will be going to the junk yard to get an oil slinger and a drilled bolt.