Show Entry Question of Ethics

[jbreeves72C10]

Hi Forum Members,
I have a question of ethics that I am not sure about and would like your input. I have an almost restored C10 and have entered and won several car shows in the Dallas area. My question is what class to enter to be politically correct. The chassis, engine, transmission, drum brakes, spring suspension, steering, etc are 68. The front clip and bumper is 70. The cab VIN comes back as 72. Should I enter into the 60-70 trucks based on the majority of the parts or the 70-80 class based on the VIN? I have always entered by the VIN but the last show I entered in the 68 class and won. I wasn't sure if I should feel bad or not.
Thanks,
JB