Hello everyone. I'm a new 68 d200 owner. I bought it running, barely, and am working on cleaning it up. Pulled the gas tank, leaking and the radiator, leaking too. A source for replacement or repair would be helpful.

But mostly I'm concerned about the oil on the plug tips. Is that a sure sign the head gasket is blown or could it be the spark plug tube seal failing along with a valve cover gasket that had surely failed.

And no, I didn't run a compression test. I thought of that as I was looking at the gas tank on my garage floor.

Thanks for any thoughts.