I did this less than 6 months ago after talking to Tom Langdon. He advised to 'tee' it into the heater hose.
I bought the heater plate from Langdon's and it came a direction sheet that was very helpful (eliminated all the guessing.)
I just looked for a pic or two, but I haven't retrieved them from the camera yet. I'll attach a couple tomorrow to illustrate. I used a thermostat housing from mid 70's Nova that I was able to drill and tap for the supply fitting to the manifold.
It works great and has never leaked.
