Here is what it could look like. I restored my 300H (the one in the listing is a non-letter 300 it appears) in 1978 and it is still one of my favorite driving vehicles. It was a shorter wheelbase than the previous letter series, and felt lighter and more nimble as a result.
This example in the listing has factory a/c, so it would be a good car to restore it appears. But don't expect to get your money out at this point in time..............................