Is the front bed panel on 58-59 fleetsides the same as 60-66?

[bbc26]

I want to put a fleetside bed on my 55 and picked up a complete pair of 58 bedsides (both inners and outers). I know that the tailgate is the same for 55-66 fleetsides.

I have a 65 Fleetside bed and am hoping to use it to transfer the 58 panels onto. I just dont want to tear apart a perfectly good bed only to find that the front panel is gonna require a ton of cutting and fabbing to make work.

Anybody know if these panels are interchangeable?

Thanks in advance.