Depends how it's routed, which is why I asked about pics, but the valve covers were already off.
If there's a bunch of excess hose ran high, and it's routed into the manifold rather than carb base, or something "custom" then possibly. Or it could be routed into the back of the plenum which just happens to drain into #3... Plus, it's probably the easiest and cheapest to rule out.
Sadly, it seems more likely the issue is deeper, but sometimes those things are tougher to determine without a teardown.
Broken rings came up, and that also seems like a reasonable suspicion. Hopefully not the case, but a compression test will tell a lot and I think I read it's planned to happen too.
Hope for the best with OPs folks. No car is more important than time with family.
