I finally have heat! I haven't attached the planned fan on my heater core yet. I only had my footwell blowers to pull the heat in through the stock heater ducts and it worked! I had heat tonight and it was pretty warm. The heater cores attach directly to the heater duct ends right at the flapper with a Spring disappeared for a couple days here in NY so I was able to test the system a little and so far so good.
I also took my car out on the highway for 40 miles to make sure I would break any lines tomorrow morning. I am going to watch the races at Lime Rock and will bring my car in case anyone else is there...
Once again I tested the RPM and temps and could not get above 190 degrees but it is cold outside
3000 rpm in 5th 94mph (assumed and theoretical)
3500 rpm in 5th 111mph (assumed and theoretical)
4000 rpm in 5th 125mph (assumed and theoretical)
Here is a photo of my heater setup. I know that a lot of things in this build are big bucks so this is my two cents on a heater system that is not so "big bucks"... and seems to work so far. Some of the fittings were changed in the final fitting to get the correct fit with the hoses.
And I didn't use the fan setup on the left side yet. I wanted to see if the footwell blowers would be enough. The tip of my heater core setup goes into each of the wheel wells. (I have two of these in total - one on each heater duct) I could add a 90 or a 270 degree silicone hose at the end of the heater core to point the air that is coming into the core towards the front of the car or front of the wheel well...