Took too many of these apart i can't remember exactly how they went.
So, on the early cases with the dual oil relief valves...
The bigger relief valve, is it a grooved one, or a solid one?
Here's a few grooved and one sold, to illustrate what i mean:
Scripture shows the late single-relief with grooved plugs,
So these non-grooved must have come from earlier dual-relief cases, right?
