On some progress notes...
I got the rear end, vent & track bar installed.
I also mocked up the radiator and core support.
I had to do some welding, grinding on the core support and cutting on the radiator. The radiator has tabs that are supposed to be in the retainers, but not one of them was in the right spot. This was the closest one, but it was in the way.
Since they aren't needed, I just cut this one off. The others won't be seen, so they'll stay where they are. There aren't locating tabs like this on the factory radiator, so it's not a big deal.