65 904 leaking pretty bad but don't know where?

There is a little rubber seal that goes on the throttle pressure peg sticking out of the trans kind of above where the shift cable goes in. They will leak there and run all arounf the pan rails making you think the pan gasket is leaking, when it may not be. Jake's 65 was leaking like you describe. Replaced that little seal and it's bone dry now.