Timing Chain Oiling Confusion

[jefflock]

I recently disassembled two 70 model 340's. One motor had the 2 top bolts drilled out that hold the cam retainer on to allow oil from the valley to drain on the chain and was assembled with a slinger. The other had no slinger or drilled bolts but has a tab that bolts to the bottom bolt on the retainer. I'm guessing it is a scraper. What is the correct? I'm trying to put one motor back together. Any help would be appreciated. Thanks Jeff

 

[388dart]

facing front of engine - top left bolt should have hole to allow oil from the galley to drip through and oil the chain. tab goes on bottom with no bolt in right sidehole.

 

[jefflock]

Thanks! I'm waiting for the cam to show up then I can finish it. It's sitting there on the stand assembled as far as I can go. Jeff