It wasn’t raining and I had some time, so I opened up the bulkhead passthrough. It had a chunk of glue inside. I was able to shatter it with pliers. I stuffed the end through the heater valve hole. It’s a tight fit with the split loom tubing protecting the wires from the sheet metal, I might add a grommet. When I was fitting the old heater, I looked in the parts boxes for the gasket. I discovered the gasket set I purchased is for ‘55+. I also found some busted studs in the mounting holes, so I’ll have to get those out first. I just ordered the gaskets for left and right side vents, and I decided now is a good time to install the inner firewall cover, so ordered that too. The upper cowl vent has a broken hinge rivet, but I wanted to see how that all goes together and discovered the lever mechanism conflicts with the firewall mounted brake pedal. I’ll move the pedal over ½” or so.