I JUST redid my white seats,headliner and rug in my T/A and it looks great.So I thought I would take a ride with my new interior.10 min. into the ride my heater core decided to dump alot of antifreeze onto my 10.min. new rug I have never swaped one out before so I just wanted to see if there were any tips or suggestions on taking out or putting in one and where to get a good one.
THANKS,David

I don't recall if TA's were available with AC or not so I don't know if your car is AC or non AC. My 'Cuda is a non AC car and removing the heater core is fairly easy. There are three nuts on the firewall side from the blower motor and one inside by the fresh air intake from the cowl. There are three cables, two from the heater control and one for the fresh air floor vent. It will help if you remove the clove box to gain access. There is also an electrical connection for the blower motor. Before removing the heater box blow the water out through the heater hoses to minimize the mess inside the car. As for new cores, I am not all that impressed with the quality. I put a new one in my car and it started to seep about 2-3 years after I put it in. I've got a bottle of Bars stop leak in it now and it's holding, but next Spring I'll break down and put another new one in and keep my fingers crossed.
If your car has AC it will be significantly more involved. Besides the AC lines the heater/AC box is bigger and heavier and probably has vacuum lines and more electrical connections. The cost of the heater cores for either one should be similar and under $100.00. Good luck.

THANKS 5spdcuda,
No they did not come with a/c:)
THANKS! for the info.I will give it my best.
THANKS,David

You may find the diagrams at these links useful;

http://www.hamtramck-historical.com/images/serviceHighlights/70%20sh%2033.jpg

http://www.hamtramck-historical.com/images/serviceHighlights/70%20sh%2034.jpg

http://www.hamtramck-historical.com/images/serviceHighlights/70%20sh%2035.jpg

If you buy your new heater core from one of the local parts stores you'll find that the frame on the new core does not fit as good as the old one. I took my old core and removed the frame from it and soldered it on to the new core.