1965 FASTBACK 68 302 ENGINE. This winter while in storage in the garage, I noticed a leak, it is antifreeze. It is dripping from the bellhousing. I cannot see anything coming from the intake, so it must be from the back of the block. It is not all the time, but will leak a small puddle then stop, the leaked liquid will dry up then a few days later it will leak another small puddle. If I start it up and bring it to temp and pressure it does not show any signs of a leak. Any ideas of where this may be from and how to stop it. I would like to take it on an extended vacation this summer, but would like to get this problem resolved before we leave.