Ok, this is something I have not seen before and I don't know if it was real or not. It is a 75 Chevy pick up with 1/2 ton badges on the fenders, 350, th350/203 combo. The trans pan has a drain plug in the front of the pan that looks factory installed and it is not a deep pan. It has an 8 lug D44 front and a 14ff rear with heavy duty leaf springs. Everything on the drivetrain looks factory. Is it possible that it could be factory? Is it what was considered a heavy half ton? The tag in the door jam rated it for 7800#.