1969 Barracuda Fastback

Mpgmike, RealWing, and Qkcuda thank you for the input, I really appreciate it. It is very helpful having other members to doublecheck on my work.
In the past, I read an article about corrosion due to a lack of ground to the water system. The radiator should still have ground through the radiator mounting bolts - that is why the cork gasket is just on one side, also the transmission cooler lines should provide some ground to the radiator, but as stated above "At worst it won't hurt", I will follow your advice and opinion and run a separate ground wire to the radiator.

Qkcuda, thank you for making me aware of that modification. I hope the alternator does not melt the electric system again. I checked the whole engine harness and had to replace some wires. The alternator cable on the bulkhead connector was badly melted. Regarding this problem, I opened a few weeks ago a separate thread in the tech section.

Thanks, Wolfgang