All 40 passenger cars, wagons and sedan deliveries use the same FRONT bumper. 41 half tons and sedan deliveries use this FRONT bumper also.
At the rear, all 40 Coupes, sedans and converts use the same bumper from the FRONT except installed on REAR.
The REAR wagon is by itself, but the flatter style REAR pickup from 40 and 41 is virtually the same shape but the inner bolt holes are different spacing than the wagon.
I believe the REAR delivery is unique, someone help me out on this.
All OEM Henry bumpers in 40 have a pair of raised ridges on the back side. Most are about one and a half inches apart but I have seen some that are spaced even further apart. The repops are smooth.
All Henry 40 bumpers are SPRING steel, as are the braces (brackets). To my knowledge the repop parts are not.
Last, many 39's run the 40 style bumper. I believe 39s have a horizontal groove centered on the outer face with a blue accent color originally in the groove (at least on Deluxe, not sure on Standard). All 40 bumpers are smooth face and none had a Ford script stamped in them.
RPM