You can buy them from some Repro- places. Here's one:
[img]
http://www.taillightking.com/images/49-50ChevyCar/49-56_Chevy_TrafficLightViewer1.JPG[/img]
Oh, and Brad, it can't effect fuel mileage unless you're going over 45 - which isn't real typical in Chevy's. At UTA we did an autmotive engineering lab and found that on all vehicles wind resistance does not kick in until about 45 mph. I guess the extra weight might effect it a TAD, but not enough to notice.
