help leaky softplug

Well this is my problem. I just spent my entire savings geting my 340 rebuilt. I get it home and put it in my 1980 dodge D-50. I start it up and I have a softplug leaking in the back of the head between the firewall and engine. I dont want to spend the 10 hours it takes to pull the motor just to spend 2 minutes changing the softplug. Is there anything I can do to stop the leak without pulling the motor.:salute: