Ask away..... I will answer any questions I can. If I can't, well there are over 3000 other members on this forum to draw from.

Leaking heater cores are common. If you have it apart, I would definately put a new one in. They aren't that expensive. The lines are easy, there is a 5/8" line from the head to the core, and a 3/4" line from the core to the water pump housing. At least that is how my 68's are.