Oil Leak in Housing

[hytem]

I have an oil leak in my 82SC between the rear cylinder head and camshaft housing, which apparently will require an engine drop to fix. This doesn't appear to be a bad leak--maybe a drop or so per week, when the engine is hot. This car only sees limited weekend driving (<2500 miles per year.)
My inclination is to simply live with it, since everything else seems OK. Strong engine, no smoke, etc. Any suggestions on other options? I wonder if anyone has had any positive experiences with oil re-seal additives or external sealants.