Top ring Installation

I guess I'm kinda hijacking my own thread here, but i have a question about the camshaft thrust plate.

I was looking at the "how to assemble the front of a small block" thread and noticed that mine was a bit different. I have the oil drip tab and three solid bolts, there isn't a hole in the top left bolt. And it never had an oil slinger on the crank. I ran the motor like that before without any issue, but should I either drill a hole through a bolt, or get a new one, and add an oil slinger to the crank? I out it together exactly how it was stock, was the same way with another 318 I took apart.

Why is it different than the "how to assemble a small block" thread? The service manual I have shows it with a solid bolt. And no slinger.