Trailing Arm Differences?

[D-n-Tyke]

I am trying to figure out if there are any differences between the C10 and C20 rear trailing arms. I have a 1969 C20 Suburban that I am changing over to 5 lug by putting in a 1971 C10 rear end. When I got the rear end it also came with the trailing arms. I want to clean up whatever trailing arms end up under the truck so if they are the same I will clean up the C10 arms at the same time I clean up the rearend and then just install it all at once. But if the C20 are different then I will need to pull htem off and clean them up and reinstall. Can someone help me out, are they the same or are the C20 ones beefier?