340 Oil Priming Question First Start

TT5.9mag said
Hydraulic lifters will have a retaining clip in the top of em. Pretty easy to identify. Solids will not. You can peek down with a flashlight and see it through a pushrod hole even with the intake on. Another way to tell is take a pushrod and seat it in the lifter and push down on it. You’ll get some spongy movement. If the engine has just run or been primed this is a harder way to identify them as the lifters will be pumped up. Below is a hydraulic lifter.
View attachment 1716250606

Don’t see any retainer or clip unless it’s perfectly circular and then I am not sure if that could even be a clip in there. For sure no square clip like the one you have shown. No compression noted when pushing on the lifters.