For all of those slot car fans out there. I dug these out of a storage box where they've been for 30 years. I believe these are all from the 1970-75 time frame, Aurora AFX HO scale.
At the time, I just thought they were cool, didn't realize the significance of these cars in period. In the first picture we have a Porsche 917K (customized with some coast guard decals from another kit), the '71 UOP Shadow Mk II, what I now recognize as the AutoWorld/Oscar Kovalseki McLaren M8 (the wing went away long ago), and a Ferrari 512 LeMans car that back in the day actually had working headlights (long gone).
In the second picture is a Model A of a generation of AFX with a much longer wheelbase and huge tires. Then a Plymouth Satellite NASCAR, the Penske/Donahue Matador TA, and the 1955 "Heavy Chevy" drag car.
I was surprised at the degradation of the plastic. Even if I could get the chassis running again and find tires (most of these had foam tires which we used to soak in the lube to get them to drift easily. A couple have silicone tires which are as good as the day I bought them) the first hard crash would just destroy the bodies. Note the back edge of the McLaren.
I had some others long gone - a Lola coupe from Aurora before the AFX days, and a Cheetah as well as a Mustang and a Camaro.