Help me find a crank!

I decided to sell the /6 from my 71 Scamp and bought a 318 with pretty much everything but the crank. I was told the 318 came out of a 1968 vehicle. I need to find a crank that will work so I can begin the building process. Unfortunately, I'm brand new to this depth of engine work and I need help finding the right crank. I found this one on eBay, stamped what appears to be "285882". I'm hopeful one of y'all might be able to help! Thanks in advance!

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