12: 1965 Chevrolet Chevelle Z16
Chevy was also a company that experimenting with drag cars around this period, and the Z16 was the first foray. The design of the car was not so much different from the average Chevelle, and that left a bad taste in the mouths of consumers. The 396 V8 engine was notable for its performance at the time, and it was relatively easy to work on as well. But reliability proved to be a thorn in the side of new owners.
GM didn’t market the Chevelle Z16 which was also quite strange for the company. Thus there were only 200 of them ever produced. With such a rare number of vehicles, parts are hard to come by so you’ll often find these in the junkyard. Sure, there are other comparable muscle cars, but the Z16 is worth avoiding.