Starting to make progress. However ran into some challenges.
These heater core inlets don't look right after getting the heater box in. Not sure if I did something wrong or what but I imagine they are supposed to stick out evenly and further.
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The aftermarket replacement heater cores have shorter tubes that barely protrude through the firewall... Yours look better than mine did... Mine both tubes had less than 1/2" protruding.... I found the tubes are exactly the same size as 1/2" household plumbing copper so I cut the tubes right even with the fiberglass heater box & spliced in 1" of pipe.... four slip couplers, a couple inches of copper pipe & fifteen minutes soldering now the nipples stick out like they should...
