If your car is a 74, it came from the factory with a big bumper front & rear, anything could have been done to your car before you bought it, no matter what anyone tells you.
My 74 was built in Canada, and had the large bumpers. I changed it to the better looking early small bumpers.
but is the 74 supposed to have notched bumpers for tht big bumper? mine even has the small rear bumper now tht u mention it. maybe i should take pics to show u guys, im not sure.