I've searched the forums and can't find the exact answer. I have a '73 240 with good bumpers but really like the way the earlier bumpers fit closer to the body. What are the differences in the bumpers from '70-'72 and '73? The rear bumpers look to be the same as far as I can tell (not having a '70-'72 to compare to). The fronts look different in at least the mounting hardware and over-riders. Any info would be appreciated. Leeboat (Smyrna, GA)