TR6 Spin on filter o-rings

[Bandre Frank Contractor AMC/SCP <Frank.Bandre@scott.af.mil>]

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Does anyone know the proper dimensions for the inner o-ring for a spin-on
oil filter adaptor for a TR6.  Not sure if the inner ring was put on after
the rebuild of my engine was completed, and would like to have one on hand
before I take the adaptor off.

Also, if the inner ring is missing, what is the worst that can happen.  Oil
not going to cooler and then the filter?  Checking the valves, they are
clearly getting oil and the pressure is running 70 lbs cold and 40-50 lbs
hot, so oil is flowing.

Frank

'76 TR6 CF57005U