Wanted to share a couple photo's of the heater matrix and it's mods. The Prefect heater tubes stick out the end of the matrix tanks while the Cobra needs them out the top. I reused the tubing from the Prefect, straightened them and silver soldered them into place. Holes were patched with a small piece of copper and silver soldered all in place.
Note that the tubes are silver soldered inside the tank as well for strength on the tube. This is the same way they were done originally.
The matrix was cleaned, rodded out and the tanks soldered on. Once completely soldered, the matrix was pressure tested and installed into the heater box.
Larry