I've got a 69 Mach 1 that I've owned since '84 and had never questioned the authenticity of the vin tag until '89 when I moved to Pheonix. During the out of state inspection the AZ H.P. said the vin tag wasn't original and that it would have to be removed (didn't have the label around it and just didn't look right) and vin would have to verified from fender aprons (whiched matched) AZ H.P. then put a decal on drivers door jam with an AZ vin #, I then moved to KY there out of state inspection disregarded the AZ vin and removed it and registered the car under the original vin. Since then I've tried doing research on vin tags and have gotten more and more confused. I want to install a replacement vin tag (with 'not original' stated below number) What I'm wondering is should the vin be reverse or positive stamped I 've seen it done both ways. I've talked to judges at local shows and they just scratch their heads.