Inverted Oil System Fitting Question

[bipedream]

We've been working to get a Raven Inverted oil system installed in a Lycoming IO-360-C1C (Rear induction/unique sump) on my Skybolt. The airplane had a Christen system installed earlier in its life but it was removed.

The sump has something (is it supposed to be there or not??) that is blocking installing the T-fitting (upright oil pickup) that goes into the drain plug location for this horizontal sump engine.

Here are a few photos showing the issue and how far you can insert the fitting.

Thanks,
Matt

 

[acropilotbret]

 

[bipedream]

 

[death trap]

 

[StinsonPilot]

 

[Skybolt31]

 

[PittsDriver68]

 

[StinsonPilot]

 

[death trap]

 

[StinsonPilot]

 

[bipedream]

 

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[bipedream]