Nice restoration of both. I never got an original '69 Chevelle back then. I caught the Chevelle kit in 1977-8 when the Countdown kits came out and I opted for the convertible.
During the dark days at AMT, a large amount of kits got the solid chrome replacement and elimination of the red lens between 1968 and 1977. Included with this Chevelle are; 1953 Studebaker, 1965 Galaxie, 1959 Mercury, 1963 Chevy II wagon, 1969 Corvair just to name a few. I think the modification of the '69 Chevelle tail lights are the worst of all of them. A simple solution is to buy Modelhaus replacements.
Some of the '69 AMT kits could be built stock like the '69 Impala. Just the engine on this '69 Chevelle was non-stock, I thought? I believe the front marker light and the trim on the side of this Chevelle are incorrect, but again it can be fixed easily. Better to have these kits with some flaws, than not at all.
I wish that I had saved more of my kits back in the '60s like you did. My '64 Impala with lights is the only one.