Yeah it didn't actually dribble out of the block when I poured coolant in the expansion. I saw a build up of green crust in that spot. Never saw a wet spot in that spot. Sometimes I can smell burning coolant while driving. When seeing the low coolant I put the two together.

I know the coolant stop leak I used had a grit-like consistency to it. This has a fiber-ish look to it. And I remember seeing it before I used the coolant stop-leak.

No oil in the coolant, no coolant in the oil. Just coolant under the exhaust manifold which only leaks when the the reservoir is above the middle between Max and Min in the expansion tank. At that mid point it doesn't leak except the time I let it sit in triple digit weather for two weeks.

I know it needs a head gasket and I'm gonna get a reman head come winter time when I have the $ and the time to do it. Unless that is I find oil in the coolant or coolant in the oil. That's when I start selling my Star Wars memorabilia.

The exhaust-in-the-coolant thing has got me a little worried thou. No air bubbles in the expansion so far...
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'88 245,M47,Virgos,245K+

Thanks Gary.
I'm not sure if block sealant has been used. PO may have used it. Is that added to the oil or coolant?
I used coolant stop leak two years ago. $40 napa stuff. They told me buildup in the coolant passages would be minimal. After reading up on why I shouldn't use it I never used it again. Planned on getting a reman head this spring. But it'll have to wait til this winter.

The coolant stop-leak didn't appear to have these fine fibers in it.
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'88 245,M47,Virgos,245K+