As impatient as I am to get my hands on the finished product, I'm very happy that you're aiming to be as accurate as possible. Concerning the Modelhaus Impala: It covers the 1980-1985 Impala body but it has the 1981-1985 grill. 1980s had a unique grill.
Based on what is visible, they are both 1981-1985 Impalas, so your IDs make perfect sense. The Modelhaus offers this car as a resin kit, though the status of the company is in limbo right now. I myself have two of these kits.
All this talk of technology and social media is fairly spot on, but can we also talk more about kit subjects out there? I was born in 1991 so I grew up around cars from the 80s and beyond. With the exception of AMT and Lindberg in the 90s (generally speaking), nobody has really focused much on those cars that I grew up around. The hobby is very centered on kits representing vehicles from the 1950s-1970s. I'm not knocking those subjects, and I know why companies choose to focus on these decades to appeal to the majority of model builders out there. However, it would be nice to have more contemporary/semi-contemporary subjects to focus on younger generations. Some great kits that fit this bill have been released these past few years, but it is clear where the focus of the model kit companies lie. I am always envious of the wide spectrum of time periods that the armor community has to work with, especially with modern subjects. Just my 2 cents.
Hearing this makes me even more excited since Greg Wann does excellent work. I already have a few of his Mustang LX bodies and they are superb. As for the talk of the Caprice: A few weeks ago I was talking to one of my agency's EVOC instructors/testers and he stated that finding out that the Caprice would be discontinued in a few years factored into the decision to not invest in a Caprice fleet. We only have one for PR purposes.
This was my mistake for not being specific enough. It IS the 1983-1984 grill, but as pointed out it's the base version of the one offered on the Deserter kit. The headlight arrangements are a bit different but the grill itself is the same.
FYI the 1981-1982 Chevy grill was offered on the MPC "Sod Buster" version of this kit. It is also made in resin by Modelhaus for their 1981-1982 Chevy Suburban kit. Maybe if they reopen for business that would be a good source for one. I have two but have plans for those.
It's funny, I have this same exact project in mind. If memory serves me correctly, the 1991 Caprices were actually the first to receive the updated blue stripe graphics. However, there is a picture out there showing a 1991 with the old school graphics and I prefer the simplicity of these.