Heater or valve leak????? How to take it out????

Well, my 72 Scamp doesn't even HAVE a heater valve, I am pretty sure that only AC cars had that. The heater valve (if so equipped) is out under the hood in plain sight in one of the heater hoses. Don't panic about changing your heater core, it's really not that big of a deal. I did mine in about an hour of actual working time with a coffee break thrown in the middle. I would recommend taking the heater box completely out when you do this instead of just removing the clips and changing it in the car since once it's out you can lay it on the ground and wash out 3 decades worth of crud and crap, not to mention the gooey half-dried up antifreeze that's sure to be inside with no danger to your carpets. And I didn't have to take the front seat out to get to it, and I'm a pretty big guy. Good luck!!