[HO455]

One thing wish I had done at the stage you're at would have been to fabricate some mounting points for 2nd row shoulder harness seat belts.
I am going to take advantage of the impending repair work and convert my fuel tank to a non-vented gas cap. I am tired of the gas cap leaking when doing going around a tight right turn at speed with more than 1/2 a tank of fuel. Previously I installed a vent in the fuel tank sender and will route it to the driver's side and hook it to 72 Suburban style evap set up. Might be something to consider.
What are you planning for bumpers?
Have your rebuilt the door hinges?
The kick panel vent doors on mine needed new seals installed.
How is your heater core? It sure would be easier to replace with no front clip.
I don't remember if you replaced the spring shackles when you installed the new springs.