Would anyone be sble to give me the Trailing arm crossmember demensions? Please!!!

[Hazieview]

Hey guys I was going to try to take the rear suspension off of an old '66 and put it on my '81 but I was wondering if someone would be willing to give me some demensions before I get too deep.

What is the length, width and height of the trailing arm crossmember?

What is the distance between the trailing arms on the axle?

How long are the trailing arms?

If anyone could help me with these measurements I would greatly appreciate it. I would measure them myself but the 66 I am looking at is a long ways away, 3 ft deep in weeds, rattle snakes, etc. Plus I can't bust out the torch until we get some rain!

THANKS GUYS!
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