@Twisted6
Well I suppose I'll cross my fingers then :-/
@Beater
I have not unfortunately. I've doing other restoration and have had it parked and covered in plastic for a few weeks. I'm fairly confident it's the pushrods especially since they don't have pushrod guides as there's nothing else that would explain the oscillating. Next time I have the motor out or have another opportunity for some other work, I'll check the things y'all have mentioned. I don't think it's bad or concerning enough to justify a full teardown at the moment but I'll keep an eye on it.
I appreciate the feedback y'all
