Early Rear Bumper for a 280, a bigger problem?

[Metallicar]

I have searched for an answer, but I come up empty. So I am turning to the group for some help. I know that many have installed various early bumpers on the 280 cars, but mine is a 2+2, so I have a "bigger" problem.

 

I won a NOS 260 2+2 center bar on Ebay. It is just over 1" longer than a 240 coupe bar.

 

I now would like to know if the 240 and 260 2+2 side pieces are different in physical size. Of course, I do not have the early 2+2 ends , I do have the 240 coupe ends. I would like to use the 240 ends if possible. I put the 240 ends on the new 2+2 bar and it looks okay on the floor. I have yet to remove the original bumper shocks from the car. I did not want to let the genie out of the bottle, if I can't make this work. I hope some one who reads this has the early set up and can compare to the coupe.

 

Looking at the bumper, mocked up on the floor, it appears that the side pieces do not have the inside radius that matches the outside corner of the body, leaving a small gap. Is this normal? I found a decent pic of a Aussie 77 260 2+2, but I cannot really tell if this is correct.

 

 

The front should present the "normal" problems as the coupe cars since the front for both types are the same.

 

Thank you for your help.