Leak on back of manifold? ???

Locomotion said

Best set-up would be a braided line for the application. A hydraulics store may be able to provide a conversion if they have all of the associated fittings. They may even have cheaper, but just as good, alternatives to the braided stainless style. I believe oil pressure lines would have a liner.

The rear intake manifold rail seals are also known to be a leak source.

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Thanks for the tips, everyone. There was definitely oil on top of the brass oil sender fitting and the stud in the intake for it. I spent a while tonight just before dark with a rag and screwdriver wiping off as much as I could get out of there. I'll wait til better light tomorrow and run her a bit and see if 1) the leak stops or if there's more coming from elsewhere and 2) if that impacts the higher idle at all. Anyone think that bit of leak in the oil sender at the rear of the manifold will cause a high idle condition??